CVE-2023-43499: Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier does not escape Failure Cause names in build logs, res

Q: How do I fix CVE-2023-43499?

build failure analyzer: upgrade to 2.4.2. Exact commands for each OS are on this page.

Q: Is CVE-2023-43499 being exploited?

CVE-2023-43499 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-43499 affect?

CVE-2023-43499 affects build failure analyzer. Severity is medium (CVSS 5.4). Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier does not escape Failure Cause names in build logs, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to create or update Failure Causes.

Q: How urgent is CVE-2023-43499?

Priority 31/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2023-43499 is a medium-severity flaw (CVSS 5.4) affecting build failure analyzer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier does not escape Failure Cause names in build logs, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to create or update Failure Causes.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-09-20
Last modified	2026-06-17

Publisher (CNA): Jenkins Project · Vendor: jenkins

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-09-20 17:15 UTCPublished CVE record published
2026-06-17 06:25 UTCUpdated Record last modified

jenkins build failure analyzer UPGRADE

Affected: < 2.4.2

Fixed in: 2.4.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy build-failure-analyzer || rpm -q build-failure-analyzer || build-failure-analyzer --version

2. UPGRADE to 2.4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade build-failure-analyzer

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade build-failure-analyzer

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-43499?

build failure analyzer: upgrade to 2.4.2. Exact commands for each OS are on this page.

Is CVE-2023-43499 being exploited?

CVE-2023-43499 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-43499 affect?

CVE-2023-43499 affects build failure analyzer. Severity is medium (CVSS 5.4). Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier does not escape Failure Cause names in build logs, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to create or update Failure Causes.

How urgent is CVE-2023-43499?

Priority 31/100. No elevated risk signals yet.

Software pages

Jenkins vulnerabilities

Related CVEs

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CVE-2020-2244 MEDIUM 5.4 UPGRADE Jenkins Build Failure Analyzer Plugin 1.27.0 and earlier does not escape matching text in a form validation re
CVE-2019-16555 MEDIUM 6.5 UPGRADE A user-supplied regular expression in Jenkins Build Failure Analyzer Plugin 1.24.1 and earlier was processed i

References

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