CVE-2025-23419

mediumpriority · track · 11OT risk · elevatedEPSS 0.028 · 86 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

2.79% (86th) EPSS

CVSS 4.3 · medium

Is it mine?

58 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-22

When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. This vulnerability arises when TLS Session Tickets https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_ticket_key are used and/or the SSL session cache https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_cache are used in the default server and the default server is performing client certificate authentication. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

cvss

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

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.1–5.3

v3.14.3mediumAV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · f5sirt@f5.comexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · NCSC-NL NL

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · f5sirt@f5.com

v4.02.1lowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-863USprimaryCWE-287USCWE-863US

exploits (2)

Public proof-of-concept and weaponised exploit code.

harley-ghostie/safe-check-CVE-2025-23419Script em python scanner safe-check da CVE-2025-23419PoC · poc_in_github
xitexploiter96-dot/CVE-2025-23419xitexploiter96-dot/CVE-2025-23419PoC · poc_in_github

affected products (58)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
Hitachi Ops Centerall versionscert_bundDEcpe:/a:hitachi:ops_center:-
NGINX NGINX OpenSource <1.26.3all versionscert_bundDE
NGINX NGINX OpenSource <1.27.4all versionscert_bundDE
NGINX NGINX Plus <R32 P2all versionscert_bundDE
NGINX NGINX Plus <R33 P2all versionscert_bundDE
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
NGINX NGINX Plus< R32 P2cert_bundDE
NGINX NGINX Plus< R33 P2cert_bundDE
Nginx Nginx≤ OpenSource <1.27.4cert_bundDE
Nginx Nginx≤ OpenSource <1.26.3cert_bundDE
F5 NGINX Open Source1.11.4 → *enisa_euvdEU
F5 NGINX PlusR17 → *enisa_euvdEU
Canonical Ltd. Ubuntu≤ 24.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 22.04 LTSfstec_bduRU

showing 20 of 58

advisories (5)

Vendor and ecosystem advisories describing this.

NCSC-2025-0041Kwetsbaarheden verholpen in F5 BIG-IPNL2025-02-07csaf · ncsc_nlNL
F5 heeft kwetsbaarheden verholpen in BIG-IP.
WID-SEC-W-2025-0274NGINX: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2025-02-05csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in NGINX NGINX Plus und NGINX ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
WID-SEC-W-2025-0287F5 BIG-IP: Mehrere SchwachstellenDeutsch2025-02-05csaf · cert_bundDE
Ein Angreifer kann diese Schwachstellen ausnutzen, um beliebige Systembefehle auszuführen, Sicherheitsmaßnahmen zu umgehen, Cross-Site-Scripting-Angriffe durchzuführen und einen Denial-of-Service-Zustand zu erzeugen.
BIT-nginx-2025-23419TLS Session Resumption Vulnerability2025-02-07vendor · osvUS
When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. This vulnerability arises when TLS Session Tickets https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_ticket_key are used and/or the SSL session cache https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_cache are used in the default server and the default server is performing client certificate authentication. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
BIT-nginx-gateway-2025-23419TLS Session Resumption Vulnerability2025-12-03vendor · osvUS
When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. This vulnerability arises when TLS Session Tickets https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_ticket_key are used and/or the SSL session cache https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_cache are used in the default server and the default server is performing client certificate authentication. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund ncsc_nl NVD CVE.org MITRE

published 2025-02-05modified 2026-10-08

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+4968 more

references (7)

External citations — patches, advisories, analysis.

http://www.openwall.com/lists/oss-security/2025/02/05/8 cnnvd
https://my.f5.com/manage/s/article/K000149173 cnnvd
https://vigilance.fr/vulnerability/nginx-read-write-access-via-SSL-Session-Resumption-Client-Certificate-Authentication-46294 cnnvd
https://my.f5.com/manage/s/article/K000149173 enisa_euvd
http://www.openwall.com/lists/oss-security/2025/02/05/8Mailing ListThird Party Advisorynvd
https://lists.debian.org/debian-lts-announce/2025/03/msg00017.htmlIssue TrackingThird Party Advisorynvd
https://my.f5.com/manage/s/article/K000149173Vendor Advisorynvd

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