5.4

CVE-2021-21619: jenkins project jenkins claim plugin Cross-site Scripting

CVSS: 5.4v3.1MediumModified
AliasesGHSA-48hr-jg4p-w4p4
Published 24-02-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-21619 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in jenkins project jenkins claim plugin. EPSS estimates a 9.39% chance of exploitation in the next 30 days, higher than 95.3% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (NVD)
EPSS score
9.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-02-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Jenkins Claim Plugin 2.18.1 and earlier does not escape the user display name, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers who are able to control the display names of Jenkins users, either via the security realm, or directly inside Jenkins.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

9.39%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

0.00 pp

From 9.39% on 20-09-2026

20-09-202620-10-2026
EPSS score
9.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Jenkins1 product
Jenkins project1 product
Org.jenkins-ci.plugins1 product
  • claim< 2.18.2

3 vendors · 3 products

References

5 links