Description
Jenkins 2.251 and earlier, LTS 2.235.3 and earlier does not escape the tooltip content of help icons, resulting in a stored cross-site scripting (XSS) vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Jenkins project | Jenkins | unspecified – ≤ 2.251, unspecified – ≤ LTS 2.235.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenShift 4 | jenkins | 2.235.5.1600414805-1.el7 | RHSA-2020:3841, RHSA-2020:3808 |
| Red Hat OpenShift 4 | openshift +1 | 4.3.37-202009120213.p0.git.0.dffefe4.el8 | RHSA-2020:3808 |
| Red Hat OpenShift 3 | jenkins | 2.235.5.1600415953-1.el7 | RHSA-2020:4223 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Jenkins 2.235.3 - 'tooltip' Stored Cross-Site Scripting EDB-49232 · webapps · Dec 11, 2020
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.jenkins-ci.main:jenkins-core | < 2.235.4 | 2.235.4 | GHSA-hvmc-7g2x-r3p9 |
| Maven | org.jenkins-ci.main:jenkins-core | >= 2.236, < 2.252 | 2.252 | GHSA-hvmc-7g2x-r3p9 |
Advisories 3
- RHSA-2020:3808 Red Hat Security Advisory: OpenShift Container Platform 4.3.38 jenkins and openshift security update Red Hat Security Advisories (RHSA) · Aug 8, 2026
- RHSA-2020:4223 Red Hat Security Advisory: OpenShift Container Platform 3.11.306 jenkins security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2020:3841 Red Hat Security Advisory: OpenShift Container Platform 4.5.13 jenkins security update Red Hat Security Advisories (RHSA) · Aug 5, 2026