CVE-2023-40577

mediumpriority · track · 22EPSS 0.006 · 50 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.63% (50th) EPSS

CVSS 5.4 · medium

Is it mine?

16 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

Alertmanager handles alerts sent by client applications such as the Prometheus server. An attacker with the permission to perform POST requests on the /api/v1/alerts endpoint could be able to execute arbitrary JavaScript code on the users of Prometheus Alertmanager. This issue has been fixed in Alertmanager version 0.2.51.

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.15.4mediumAV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nsecondary · OSV

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · NCSC-NL NL

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-79USCWE-79USCWE-79USCWE-79US

affected products (16)

Products and version ranges known to be affected.

Oracle Siebel CRM 17.0-26.5all versionscert_bundDEcpe:/a:oracle:siebel_crm:17.0-26.5
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
prometheus alertmanager≤ ≤ 0.25.0enisa_euvdEU
Prometheus Monitoring Community alertmanager≤ 0.25.1fstec_bduRU
Red Hat Inc. OpenShift Container Platform≤ 4.15fstec_bduRU
АО «НППКТ» ОСОН ОСнова Оnyx≤ 3.1fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 12fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 11fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
communications_cloud_native_core_network_function_cloud_native_environmentall versionsncsc_nlNLcpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:24.2.0:*:*:*:*:*:*:*
communications_cloud_native_core_network_function_cloud_native_environmentall versionsncsc_nlNLcpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:24.3.0:*:*:*:*:*:*:*
debian debian linux= 10.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
prometheus alertmanager= 0.25.0nvdUScpe:2.3:a:prometheus:alertmanager:*:*:*:*:*:*:*:*
Bitnami alertmanager0.25.0 → 0.25.1osvUSpkg:bitnami/alertmanager
Go github.com/prometheus/alertmanager< 0.25.1osvUSpkg:golang/github.com/prometheus/alertmanager

advisories (6)

Vendor and ecosystem advisories describing this.

NCSC-2025-0021Kwetsbaarheden verholpen in Oracle CommunicationsNL2025-01-22csaf · ncsc_nlNL
Oracle heeft meerdere kwetsbaarheden verholpen in zijn Communicatieproducten, waaronder Oracle Communications Unified Assurance, Oracle Communications Cloud Native Core Network Function en Oracle Communications Order and Service Management.
WID-SEC-W-2025-0148Oracle Communications: Mehrere SchwachstellenDeutsch2025-01-21csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
WID-SEC-W-2026-2451Oracle Siebel CRM: Mehrere SchwachstellenDeutsch2026-07-21csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Siebel CRM ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
GHSA-v86x-5fm3-5p7jAlertmanager UI is vulnerable to stored XSS via the /api/v1/alerts endpoint2023-08-23ghsa · osvUS
### Impact An attacker with the permission to perform POST requests on the /api/v1/alerts endpoint could be able to execute arbitrary JavaScript code on the users of Prometheus Alertmanager. ### Patches Users can upgrade to Alertmanager v0.2.51. ### Workarounds Users can setup a reverse proxy in front of the Alertmanager web server to forbid access to the /api/v1/alerts endpoint. ### References N/A
BIT-alertmanager-2023-40577Alertmanager UI is vulnerable to stored XSS via the /api/v1/alerts endpoint2024-11-08vendor · osvUS
Alertmanager handles alerts sent by client applications such as the Prometheus server. An attacker with the permission to perform POST requests on the /api/v1/alerts endpoint could be able to execute arbitrary JavaScript code on the users of Prometheus Alertmanager. This issue has been fixed in Alertmanager version 0.2.51.
GO-2023-2020Alertmanager UI is vulnerable to stored XSS via the /api/v1/alerts endpoint in github.com/prometheus/alertmanager2024-08-21vendor · osvUS
Alertmanager UI is vulnerable to stored XSS via the /api/v1/alerts endpoint in github.com/prometheus/alertmanager

also known as (7)

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 NVD CVE.org MITRE

published 2023-08-25modified 2026-06-17

references (9)

External citations — patches, advisories, analysis.

scry

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