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No exploitation reportedFix available

CVE-2025-4278

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in GitLab

No exploitation reported by the sources we read.

  • Published2025-06-12
  • Fixed in18.0.2
  • WeaknessCWE-80

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting with 18.0 before 18.0.2. Under certain conditions html injection in new search page could lead to account takeover.

Timeline

dates in UTC
  1. 2025-06-1210:16CVE publishedNVD

Versions per branch

NVD · OSV
GitLab
BranchAffectedFixed in
18.0≥ 18.0.0, < 18.0.218.0.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitLab, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • GitLabother versions: not affected
    Affected
    • ≥ 18.0, < 18.0.2fixed in 18.0.2semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-06-12

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gitlabUbuntu:16.04:LTSall versions · no fixed version listed

Full record on NVD

Fix

  1. Update GitLab to 18.0.2

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2025-06-12
  • CNACVSS 3.18.7known since 2026-10-23
  • CNAweakness (CWE)CWE-80known since 2026-10-23
  • FIRST EPSSEPSS score10.9 %read 2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Published
2025-06-12
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-wjcq-cqhf-f7rm

Frequently asked questions

What is CVE-2025-4278?

An issue has been discovered in GitLab CE/EE affecting all versions starting with 18.0 before 18.0.2. Under certain conditions html injection in new search page could lead to account takeover.

Is CVE-2025-4278 actively exploited?

Active exploitation of CVE-2025-4278 has not been confirmed. Its EPSS score was 10.9% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-4278?

CVE-2025-4278 has a CVSS v3 base score of 8.7 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

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Sources for this record