All vulnerabilities
CVE-2026-54049GHSA-w2x5-gv52-9ccv

Sakai Conversations has a Stored XSS Issue

sakaiproject sakaiMavenLibraries & packages
Open in ThreatlineRecord JSON
CVSS
8.7High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 6 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.26%Chance of exploitation activity in the next 30 days, higher than 16% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published1 Oct 2026Updated 6 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

Sakai is a Collaboration and Learning Environment (CLE). From versions 23.0 to before 23.5, and versions 25.0 to before 25.3, the Sakai Conversations tool stores topic and post messages without HTML sanitization, and the frontend renders them using LitElement's unsafeHTML() directive, resulting in stored cross-site scripting (XSS). Any authenticated user with access to a site that has the Conversations tool enabled can inject arbitrary HTML and JavaScript that executes in the browsers of all other users who view that topic or post. This issue has been patched in versions 23.5, 25.3, and 26.0.

Text from CVE List

Affected versions 17

  • sakaiaffected: >= 23.0, < 23.5CVE List
  • sakaiaffected: >= 25.0, < 25.3CVE List
  • org.sakaiproject.conversations:sakai-conversations-impl, Mavenfrom 23.0, through 23.3OSV
  • org.sakaiproject.conversations:sakai-conversations-impl, Maven23.0OSV
  • org.sakaiproject.conversations:sakai-conversations-impl, Maven23.1OSV
  • org.sakaiproject.conversations:sakai-conversations-impl, Maven23.2OSV
  • org.sakaiproject.conversations:sakai-conversations-impl, Maven23.3OSV
  • org.sakaiproject.kernel:sakai-kernel-impl, Mavenfrom 23.0, through 23.3OSV
  • org.sakaiproject.kernel:sakai-kernel-impl, Maven23.0OSV
  • org.sakaiproject.kernel:sakai-kernel-impl, Maven23.1OSV
  • org.sakaiproject.kernel:sakai-kernel-impl, Maven23.2OSV
  • org.sakaiproject.kernel:sakai-kernel-impl, Maven23.3OSV
  • org.sakaiproject.rubrics:rubrics-impl, Mavenfrom 23.0, through 23.3OSV
  • org.sakaiproject.rubrics:rubrics-impl, Maven23.0OSV
  • org.sakaiproject.rubrics:rubrics-impl, Maven23.1OSV
  • org.sakaiproject.rubrics:rubrics-impl, Maven23.2OSV
  • org.sakaiproject.rubrics:rubrics-impl, Maven23.3OSV

References 2