CVE-2025-12734

lowpriority · track · 0EPSS 0.003 · 19 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.27% (19th) EPSS

CVSS 3.5 · low

Is it mine?

20 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-28

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.6 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to, under certain conditions, render content in dialogs to other users by injecting malicious HTML content into merge request titles.

cvss

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

3.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.13.5lowAV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:Nsecondary · cve@gitlab.comexploitability 2.1 · impact 1.4

v3.13.2lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:Nsecondary · NCSC-NL NL

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-116USCWE-116USCWE-116US

affected products (20)

Products and version ranges known to be affected.

Open Source GitLab <18.4.6all versionscert_bundDE
Open Source GitLab <18.5.4all versionscert_bundDE
Open Source GitLab <18.6.2all versionscert_bundDE
Open Source GitLab< 18.4.6cert_bundDE
Open Source GitLab< 18.5.4cert_bundDE
Open Source GitLab< 18.6.2cert_bundDE
GitLab GitLab15.6 → 18.4.6enisa_euvdEU
GitLab GitLab18.5 → 18.5.4enisa_euvdEU
GitLab GitLab18.6 → 18.6.2enisa_euvdEU
GitLab Inc. Gitlab15.6 → 18.4.6fstec_bduRU
GitLab Inc. Gitlab18.5 → 18.5.4fstec_bduRU
GitLab Inc. Gitlab18.6 → 18.6.2fstec_bduRU
GitLab Community Edition, Enterprise Edition≤ vers:unknown/*ncsc_nlNL
GitLab GitLab≤ vers:unknown/*ncsc_nlNL
gitlab gitlab15.6.0 → 18.4.6nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab18.5.0 → 18.5.4nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab18.6.0 → 18.6.2nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Bitnami gitlab15.6.0 → 18.4.6osvUSpkg:bitnami/gitlab
Bitnami gitlab18.5.0 → 18.5.4osvUSpkg:bitnami/gitlab
Bitnami gitlab18.6.0 → 18.6.2osvUSpkg:bitnami/gitlab

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2025-0390Kwetsbaarheden verholpen in GitLab CE/EENL2025-12-11csaf · ncsc_nlNL
GitLab heeft kwetsbaarheden verholpen in GitLab CE/EE.
WID-SEC-W-2025-2822GitLab: Mehrere SchwachstellenDeutsch2025-12-10csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in GitLab ausnutzen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, um einen Denial of Service Angriff durchzuführen, um Sicherheitsvorkehrungen zu umgehen, und um Informationen offenzulegen.
BIT-gitlab-2025-12734Improper Encoding or Escaping of Output in GitLab2025-12-18vendor · osvUS
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.6 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to, under certain conditions, render content in dialogs to other users by injecting malicious HTML content into merge request titles.

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 ncsc_nl nvd osv NVD CVE.org MITRE

published 2025-12-11modified 2026-10-14

references (11)

External citations — patches, advisories, analysis.

scry

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