CVE-2020-2252: jenkins project jenkins mailer plugin Improper Certificate Validation
Vulnerability summary
CVE-2020-2252 is a medium (CVSS 5.8) Improper Certificate Validation vulnerability in jenkins project jenkins mailer plugin. EPSS estimates a 0.96% chance of exploitation in the next 30 days, higher than 61.5% of scored vulnerabilities.
Not severe (CVSS 4.8, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2Timeline
- 16-09-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST4.8MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS trend
Probability
0.96%
Chance of exploitation in the next 30 days
Percentile
62%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.96% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Jenkins1 product
- mailer≤ 1.32
Jenkins project1 product
- jenkins mailer plugin≥ unspecified, ≤ 1.32
Org.jenkins-ci.plugins1 product
- mailer≥ 1.32, < 1.32.1 | ≥ 1.30, < 1.31.1 | < 1.29.1
3 vendors · 3 products
References
5 links- www.openwall.com/lists/oss-security/2020/09/16/3Mailing ListX Refsource MLISTWEBThird Party Advisory
