CVE-2020-2253 json
Missing hostname validation in Email Extension Plugin
published 2020-09-16 6 y ago modified 2026-06-17 4 mo ago also GHSA-4qrj-99r6-jfrh , EUVD-2022-2432
- cvss
- 4.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
Jenkins Email Extension Plugin 2.75 and earlier does not perform hostname validation when connecting to the configured SMTP server.
Patch / fix
- maven org.jenkins-ci.plugins:email-ext 2.76
- Jenkins project Jenkins Email Extension Plugin 2.68.1, 2.69.1
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| GitHub | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.jenkins-ci.plugins:email-ext | <2.76 |
2.76 |
Affected products
- Jenkins project Jenkins Email Extension Plugin
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
github.com
/jenkinsci/email-ext-plugin/commit/ac039ba581f5946975a327709ff201b459900caa
web
-
jenkins.io
/security/advisory/2020-09-16/#SECURITY-1851
web, vendor-advisory
-
openwall.com
/lists/oss-security/2020/09/16/3
mailing-list, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-2253
advisory
-
github.com
/jenkinsci/email-ext-plugin
package
Sources
- CVE List CVE-2020-2253
- GitHub Advisory GHSA-4qrj-99r6-jfrh
- NVD CVE-2020-2253
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