CVE-2025-4439

mediumpriority · track · 22EPSS 0.003 · 20 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.28% (20th) EPSS

CVSS 5.4 · medium

Is it mine?

18 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

An issue has been discovered in GitLab CE/EE affecting all versions from 15.10 before 18.0.5, 18.1 before 18.1.3, and 18.2 before 18.2.1 that could have allowed an authenticated user to perform cross-site scripting attacks when the instance is served through certain content delivery networks.

cvss

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

7.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.7

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

v3.17.7highAV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.17.7highCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · ENISA EU

v3.17.7highCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · cve@gitlab.comexploitability 1.3 · impact 5.8

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)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79US

affected products (18)

Products and version ranges known to be affected.

Open Source GitLab <18.0.5all versionscert_bundDE
Open Source GitLab <18.1.3all versionscert_bundDE
Open Source GitLab <18.2.1all versionscert_bundDE
Open Source GitLab< 18.0.5cert_bundDE
Open Source GitLab< 18.1.3cert_bundDE
Open Source GitLab< 18.2.1cert_bundDE
GitLab GitLab15.10 → 18.0.5enisa_euvdEU
GitLab GitLab18.1 → 18.1.3enisa_euvdEU
GitLab GitLab18.2 → 18.2.1enisa_euvdEU
GitLab Inc. Gitlab15.10 → 18.0.5fstec_bduRU
GitLab Inc. Gitlab18.1 → 18.1.3fstec_bduRU
GitLab Inc. Gitlab18.2 → 18.2.1fstec_bduRU
gitlab gitlab15.10.0 → 18.0.5nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab18.1.0 → 18.1.3nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab= 18.2nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Bitnami gitlab15.10.0 → 18.0.5osvUSpkg:bitnami/gitlab
Bitnami gitlab18.1.0 → 18.1.3osvUSpkg:bitnami/gitlab
Bitnami gitlab18.2.0 → 18.2.1osvUSpkg:bitnami/gitlab

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1627GitLab: Mehrere SchwachstellenDeutsch2025-07-22csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in GitLab ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen und um Informationen offenzulegen.
BIT-gitlab-2025-4439Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab2025-07-29vendor · osvUS
An issue has been discovered in GitLab CE/EE affecting all versions from 15.10 before 18.0.5, 18.1 before 18.1.3, and 18.2 before 18.2.1 that could have allowed an authenticated user to perform cross-site scripting attacks when the instance is served through certain content delivery networks.

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 nvd osv NVD CVE.org MITRE

published 2025-07-23modified 2026-06-17

references (8)

External citations — patches, advisories, analysis.

scry

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