# CVE-2025-4439: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

> CVE-2025-4439: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab. CVSS 7.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-4439
Last updated: 2026-06-17T09:33:15Z

- Published: 2025-07-23 18:09 UTC · Updated: 2026-06-17 09:33 UTC · Assigner: GitLab
- CVSS: 7.7 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
- EPSS: 0.28%, 20th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-79

## Description

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.

## Affected vendors and products

- GitLab: GitLab

## Tracked companies

- [GitLab](https://rewindex.com/company/gitlab.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-4439)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-4439)
- [https://gitlab.com/gitlab-org/gitlab/-/issues/541177](https://gitlab.com/gitlab-org/gitlab/-/issues/541177)
- [https://hackerone.com/reports/3120111](https://hackerone.com/reports/3120111)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-4439 · Markdown: https://rewindex.com/cve/CVE-2025-4439.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-4439 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:06:43.103Z