Which products and versions are affected by CVE-2021-21618?

Affected: Repository Connector (Jenkins); org.jenkins-ci.plugins:repository-connector (maven); Jenkins Repository Connector Plugin versions >= unspecified. The full list is in the CVE brief.

Is CVE-2021-21618 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-21618 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-21618?

No public exploit code is known.

How urgently should CVE-2021-21618 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2021-21618

Q: What is CVE-2021-21618?

Jenkins Repository Connector Plugin 2.0.2 and earlier does not escape parameter names and descriptions for past builds, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.

Medium

Stored XSS vulnerability in Jenkins Repository Connector Plugin

Published May 24, 2022 · Updated Jul 9, 2026 · Also known as GHSA-hg2w-3c4j-jjwm

Key Facts

Patch immediately

CVE-2021-21618 is a medium-severity vulnerability (CVSS 5.4 v3.1) affecting Repository Connector (Jenkins), org.jenkins-ci.plugins:repository-connector (maven), Jenkins Repository Connector Plugin.
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 79% probability of exploitation in the next 30 days.
Fixed versions are available, including Repository Connector <=2.0.2, org.jenkins-ci.plugins:repository-connector 2.0.3, Repository Connector 2.0.2.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

5.4

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

EPSS (30-day exploit likelihood)

79%

Higher than 99.6% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2021-21618 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Jenkins Repository Connector Plugin 2.0.2 and earlier does not escape parameter names and descriptions for past builds, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.

Affected Products

3 affected entries in total

Product	Affected versions	Fixed in
Repository ConnectorJenkins	See advisory	2.0.2
org.jenkins-ci.plugins:repository-connectormaven	See advisory	2.0.3
Jenkins Repository Connector Plugin	>= unspecified	n/a

Patched Releases

Repository Connector

<=2.0.2

org.jenkins-ci.plugins:repository-connector

2.0.3

Timeline

Publicly disclosed
May 24, 2022
Last updated
Jul 9, 2026

Weakness Type

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

FAQ

Common Questions.

Jenkins Repository Connector Plugin 2.0.2 and earlier does not escape parameter names and descriptions for past builds, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.
Affected: Repository Connector (Jenkins); org.jenkins-ci.plugins:repository-connector (maven); Jenkins Repository Connector Plugin versions >= unspecified. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Repository Connector <=2.0.2, org.jenkins-ci.plugins:repository-connector 2.0.3, Repository Connector 2.0.2.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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