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CVE-2026-42524VulnerabilityPublished Updated

Org.jenkins ci.plugins:htmlpublisher: Jenkins HTML Publisher Plugin has a XSS vulnerability in the legacy wrapper file

Affects org.jenkins-ci.plugins:htmlpublisherSource GCVE Database

0
Authoritative record:CVE-2026-42524· High 8.0

Not known to be exploited · CVSS 8.0 High : upgrade to 427.1 soon.

Data as of 27 Oct 2026, 00:07 UTC

CVSS 3.1 base score
8.0High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 427.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade org.jenkins-ci.plugins:htmlpublisher to 427.1.

Affected software

ProductAffectedFixed in
Mavenorg.jenkins-ci.plugins:htmlpublisherAffected
  • <427.1
Fixed in
  • 427.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

Jenkins HTML Publisher Plugin versoins 427 and earlier do not escape the job name and URL in the legacy wrapper file. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission. HTML Publisher Plugin 427.1 escapes job name and URL when generating the legacy wrapper file.

References

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