CVE-2026-54049

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-10-03: 110-03
Full discourse1 post
  • DFIR Lab@DFIR_Lab

    🚨 HIGH: CVE-2026-54049 (CVSS 8.7) - Stored XSS in Sakai CLE affects versions 23.0-23.4 & 25.0-25.2. Authenticated users can inject malicious scripts via Conversations tool. Patch to 23.5, 25.3, or 26.0 immediately. #CVE #Vulnerability #PatchNow https://t.co/Zaps5VxN8b

    0000029
    142 followersView on X

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