Improper certificate validation in Jenkins Mailer Plugin
Priority LOW 24CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-295.
Summary
Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.
Why it matters now
EPSS 0.00959 61st percentileScored 2026-11-07
Fix Fixed Jenkins Mailer Plugin (Jenkins project): 1.29.1, 1.31.1org.jenkins-ci.plugins:mailer (Maven): 1.32.1, 1.31.1, 1.29.1Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Jenkins | Jenkins Mailer Plugin | up to 1.32 | 1.29.1, 1.31.1 | Patch available | CNA |
| — | org.jenkins-ci.plugins:mailer (Maven) | 1.32 to before 1.32.1 | 1.32.1 | Patch available | GHSA-6fr3-286q-q3cr |
| — | org.jenkins-ci.plugins:mailer (Maven) | 1.30 to before 1.31.1 | 1.31.1 | Patch available | GHSA-6fr3-286q-q3cr |
| — | org.jenkins-ci.plugins:mailer (Maven) | before 1.29.1 | 1.29.1 | Patch available | GHSA-6fr3-286q-q3cr |
- Jenkins Mailer Plugin VendorJenkins Affected up to 1.32 Fixed in 1.29.1, 1.31.1 Patch available CNA
- org.jenkins-ci.plugins:mailer (Maven) Vendor— Affected 1.32 to before 1.32.1 Fixed in 1.32.1 Patch available GHSA-6fr3-286q-q3cr
- org.jenkins-ci.plugins:mailer (Maven) Vendor— Affected 1.30 to before 1.31.1 Fixed in 1.31.1 Patch available GHSA-6fr3-286q-q3cr
- org.jenkins-ci.plugins:mailer (Maven) Vendor— Affected before 1.29.1 Fixed in 1.29.1 Patch available GHSA-6fr3-286q-q3cr
Remediation
- Fix · CNA Jenkins Mailer Plugin (Jenkins project) Fixed in 1.29.1, 1.31.1
- Fix · GHSA-6fr3-286q-q3cr org.jenkins-ci.plugins:mailer (Maven) Fixed in 1.32.1 Advisory →
- Fix · GHSA-6fr3-286q-q3cr org.jenkins-ci.plugins:mailer (Maven) Fixed in 1.31.1 Advisory →
- Fix · GHSA-6fr3-286q-q3cr org.jenkins-ci.plugins:mailer (Maven) Fixed in 1.29.1 Advisory →
Red Hat 2 advisories
- RHSA-2020:5102 Released 2020-11-17 · Red Hat rating ModerateOpenShift Container Platform 3.11.318 jenkins-2-plugins security update
- Red Hat OpenShift Container Platform 3.11 jenkins-2-plugins-3.11.1603460090-1.el7
- RHSA-2020:4297 Released 2020-10-27 · Red Hat rating ModerateOpenShift Container Platform 4.6.1 package security update
- Red Hat OpenShift Container Platform 4.6 containers-common-1:1.1.1-2.rhaos4.6.el8, jenkins-2-plugins-4.6.1601368321-1.el8, openshift-clients-4.6.0-202010081244.p0.git.3794.4743d24.el7 +11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 3.11 | Fixed | RHSA-2020:5102 |
| Red Hat OpenShift Container Platform 4.6 | Fixed | RHSA-2020:4297 |
Not affected: 1 product
- Red Hat OpenShift Container Platform 4.6
Timeline
- 2026-10-02 Threatist record created from CVE-2020-2252
- 2026-10-03 Alias added: GHSA-6fr3-286q-q3cr
References
Advisory 3
More Jenkins Mailer vulnerabilities
- TI-2018-06292 Cross-site request forgery (CSRF) vulnerability in the Mailer Plugin 1.20 for Jenkins… CVSS 3.0HIGH 8.0
- TI-2022-05173 Missing authorization in Jenkins Mailer Plugin CVSS 3.1MEDIUM 4.3
- TI-2022-05172 Cross-site request forgery in Jenkins Mailer Plugin CVSS 3.1MEDIUM 4.3
- TI-2017-01901 Information disclosure in jenkins-mailer-plugin CVSS 3.0LOW 3.7
Sources
- CVE-2020-2252 · CVE Program
- CVE-2020-2252 · NVD
- FIRST EPSS
- GHSA-6fr3-286q-q3cr · GitHub Advisory Database · CC BY 4.0
- CVE-2020-2252 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences