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CVE-2020-2252

15
FAUCET Score

CVE-2020-2252 describes a vulnerability in Jenkins Mailer Plugin versions 1.32 and earlier, where the plugin fails to validate hostnames when establishing connections to SMTP servers. This medium-severity flaw (CVSS 4.8) has a low attack complexity and does not require user interaction, potentially leading to limited confidentiality and integrity impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.32CPE matchmatch criteria
cpe:2.3:a:jenkins:mailer:*:*:*:*:*:jenkins:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
58.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 16th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

mavenpatch availablevia ghsa
Product: org.jenkins-ci.plugins:mailerFixed in: 1.32.1
mavenpatch availablevia ghsa
Product: org.jenkins-ci.plugins:mailerFixed in: 1.31.1
mavenpatch availablevia ghsa
Product: org.jenkins-ci.plugins:mailerFixed in: 1.29.1
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: jenkins-2-plugins-0:3.11.1603460090-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.6Fixed in: jenkins-2-plugins-0:4.6.1601368321-1.el8
View patch
jenkinsvendor investigatingvia nvd_reference
View patch

Vendor Advisories (2)

mavenGHSA-6fr3-286q-q3crmedium

Improper Validation of Certificate with Host Mismatch in Jenkins Mailer Plugin

May 24, 2022
redhatCVE-2020-2252Moderate

jenkins-2-plugins/mailer: Missing hostname validation in Mailer Plugin could result in MITM

Sep 16, 2020

References

jenkins.io / security/advisory/2020-09-16
Vendor Advisory
openwall.com / lists/oss-security/2020/09/16/3
Third Party Advisory