CVE-2021-21618 Stored XSS vulnerability in Jenkins Repository Connector Plugin
Stored XSS in Jenkins Repository Connector Plugin allows attackers with configure permissions to execute scripts in past builds.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-21618?
CVE-2021-21618 is a medium-severity cross-site scripting vulnerability in Jenkins Repository Connector Plugin, published on 24 Feb 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2021-21618?
2 open source packages ship an affected version, including org.jenkins-ci.plugins:repository-connector. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.jenkins-ci.plugins:repository-connector Maven | All versions | 2.0.3 |
org.jenkins-ci.plugins:repository-connector Maven | All versions | 2.0.3 |
Products include Jenkins Repository Connector.
How do I fix CVE-2021-21618?
Upgrade org.jenkins-ci.plugins:repository-connector to 2.0.3 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-21618 being exploited?
There is no known exploitation of CVE-2021-21618 in the wild and no public exploit code.
Other vulnerabilities in Jenkins Repository Connector Plugin
- CVE-2019-1003038 Jenkins Repository Connector Plugin has insufficiently protected credentials
- CVE-2022-34195 Cross-site Scripting in Jenkins Repository Connector Plugin
- CVE-2020-2149 Credentials transmitted in plain text by Repository Connector Plugin
- CVE-2022-36903 Jenkins Repository Connector Plugin allows attackers with Overall/Read permission to enumerate credentials IDs
- CVE-2022-36904 Jenkins Repository Connector Plugin does not perform a permission check in a method implementing form validation
Sources
Also known as GHSA-hg2w-3c4j-jjwm.