CVE-2023-25725

criticalpriority · attend · 48EPSS 0.054 · 93 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

5.45% (93rd) EPSS

CVSS 9.1 · critical

Is it mine?

76 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names, which could be used to truncate the list of HTTP headers and thus make some headers disappear after being parsed and processed for HTTP/1.0 and HTTP/1.1. For HTTP/2 and HTTP/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client. The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedhaproxy-0:2.4.17-3.el9_1.2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-0:2.4.17-3.el9_1.2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-0:2.4.17-3.el9_1.2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-0:2.4.17-3.el9_1.2.src as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-0:2.4.17-3.el9_1.2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-debuginfo-0:2.4.17-3.el9_1.2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-debuginfo-0:2.4.17-3.el9_1.2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-debuginfo-0:2.4.17-3.el9_1.2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-debuginfo-0:2.4.17-3.el9_1.2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-debugsource-0:2.4.17-3.el9_1.2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-debugsource-0:2.4.17-3.el9_1.2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-debugsource-0:2.4.17-3.el9_1.2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-debugsource-0:2.4.17-3.el9_1.2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1696
Fixedhaproxy-0:2.4.7-2.el9_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-0:2.4.7-2.el9_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-0:2.4.7-2.el9_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-0:2.4.7-2.el9_0.2.src as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-0:2.4.7-2.el9_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-debuginfo-0:2.4.7-2.el9_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-debuginfo-0:2.4.7-2.el9_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-debuginfo-0:2.4.7-2.el9_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-debuginfo-0:2.4.7-2.el9_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-debugsource-0:2.4.7-2.el9_0.2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-debugsource-0:2.4.7-2.el9_0.2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-debugsource-0:2.4.7-2.el9_0.2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978
Fixedhaproxy-debugsource-0:2.4.7-2.el9_0.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2023:1978

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.1

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Hsecondary · ENISA EU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Hsecondaryexploitability 3.9 · impact 5.2

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Lsecondary · Red Hat Product Security US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USCWE-444USCWE-444US

exploits (1)

Public proof-of-concept and weaponised exploit code.

krillingws/LAB-CVE-2023-25725Lab environment to test CVE-2023-25725PoC · poc_in_github

affected products (76)

Products and version ranges known to be affected.

IBM Security Verify Access <10.0.7-ISS-ISVA-FP0000all versionscert_bundDE
IBM Security Verify Access< 10.0.7-ISS-ISVA-FP0000cert_bundDE
n/a n/a≤ n/aenisa_euvdEU
Canonical Ltd. Ubuntu≤ 22.10fstec_bduRU
Canonical Ltd. Ubuntu≤ 18.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 20.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 22.04 LTSfstec_bduRU
Novell Inc. SUSE Linux Enterprise High Availability Extension≤ 15 SP4fstec_bduRU
Novell Inc. SUSE Linux Enterprise High Availability Extension≤ 15 SP3fstec_bduRU
Novell Inc. SUSE Linux Enterprise High Availability Extension≤ 15 SP1fstec_bduRU
Novell Inc. SUSE Linux Enterprise High Availability Extension≤ 15 SP2fstec_bduRU
Novell Inc. SUSE Linux Enterprise Micro≤ 5.3fstec_bduRU
Novell Inc. openSUSE Leap Micro≤ 5.3fstec_bduRU
Novell Inc. openSUSE Tumbleweedall versionsfstec_bduRU
Red Hat Inc. OpenShift Container Platform≤ 4fstec_bduRU
Red Hat Inc. Red Hat Ceph Storage≤ 5fstec_bduRU
Red Hat Inc. Red Hat Enterprise Linux≤ 8fstec_bduRU
Red Hat Inc. Red Hat Enterprise Linux≤ 9fstec_bduRU
Red Hat Inc. Red Hat Software Collectionsall versionsfstec_bduRU
Willy Terreau HAProxy2.0.0 → 2.0.31fstec_bduRU

showing 20 of 76

advisories (5)

Vendor and ecosystem advisories describing this.

RHSA-2023:1696Red Hat Security Advisory: haproxy security update2023-04-11csaf · redhat_csafUS
An update for haproxy is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
RHSA-2023:1978Red Hat Security Advisory: haproxy security update2023-04-25csaf · redhat_csafUS
An update for haproxy is now available for Red Hat Enterprise Linux 9.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
WID-SEC-W-2023-0361HAProxy: Schwachstelle ermöglicht Manipulation von DateienDeutsch2023-02-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in HAProxy ausnutzen um Dateien zu manipulieren.
WID-SEC-W-2024-0054IBM Security Verify Access: Mehrere SchwachstellenDeutsch2024-01-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM Security Verify Access ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen, seine Privilegien zu erweitern oder komplexe Angriffe wie Cache Poisoning, Cross-Site-Scripting oder Session-Hijacking durchzuführen.
BIT-haproxy-2023-257252024-03-06vendor · osvUS
HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names, which could be used to truncate the list of HTTP headers and thus make some headers disappear after being parsed and processed for HTTP/1.0 and HTTP/1.1. For HTTP/2 and HTTP/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client. The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund redhat_csaf osv NVD CVE.org MITRE

published 2023-02-14modified 2026-06-17

references (24)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

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