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Fencer Vulns
medium 6.1

CVE-2021-21648 json

Cross-Site Request Forgery in Jenkins Credentials Plugin

published 2021-05-11 5 y ago modified 2026-06-17 4 mo ago also GHSA-gchq-9r68-6jwv , EUVD-2021-1323

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
11.3%
EPSS 11.3% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

Jenkins Credentials Plugin 2.3.18 and earlier does not escape user-controlled information on a view it provides, resulting in a reflected cross-site scripting (XSS) vulnerability.

Patch / fix

  • maven org.jenkins-ci.plugins:credentials 2.3.0.1, 2.3.7.1, 2.3.13.1, 2.3.14.1, 2.3.15.1, 2.3.19
  • Jenkins project Jenkins Credentials Plugin 2.3.0.1, 2.3.7.1, 2.3.13.1, 2.3.14.1, 2.3.15.1
  • runc openshift 4.8 1.0.0-98.rhaos4.8.gitcd80260.el7
  • runc openshift 4.8 1.0.0-98.rhaos4.8.gitcd80260.el8
  • cri-o openshift 4.8 1.21.2-5.rhaos4.8.gitb27d974.el7
  • cri-o openshift 4.8 1.21.2-5.rhaos4.8.gitb27d974.el8
  • butane openshift 4.8 0.12.1-1.rhaos4.8.el8
  • ostree openshift 4.8 2020.7-5.el8_4
  • podman openshift 4.8 3.0.1-6.el8
  • haproxy openshift 4.8 2.2.13-1.el7

red hat advisories RHSA-2021:2437

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-21648 updated cvss 5.4

jenkins-2-plugins/credentials: Reflected XSS vulnerability in Credentials Plugin

  • Red Hat OpenShift Container Platform 3.11 jenkins-2-plugins
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4.8 jenkins-2-plugins 4.8.1624022417-1.el8
    fixed: vendor fix RHSA-2021:2437
  • Red Hat OpenShift Container Platform 4.8 podman 3.0.1-6.el8, haproxy 2.2.13-1.el7, haproxy 2.2.13-1.el8, ostree 2020.7-5.el8_4, cri-tools 1.21.0-2.el7, cri-tools 1.21.0-2.el8, +133 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

11.31% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.jenkins-ci.plugins:credentials
>=2.3.16, <2.3.19
>=2.3.15, <2.3.15.1
>=2.3.14, <2.3.14.1
>=2.3.8, <2.3.13.1
>=2.3.1, <2.3.7.1
<2.3.0.1
2.3.19
2.3.15.1
2.3.14.1
2.3.13.1
2.3.7.1
2.3.0.1

Affected products

  • Jenkins project Jenkins Credentials Plugin

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.