CVE-2026-54049

8.7 HIGHpublic exploit available

Published 2026-10-01 · Updated 2026-10-06

AI risk analysis

Summary: The flaw allows an attacker to inject arbitrary HTML and JavaScript into Sakai Conversations, leading to cross-site scripting (XSS) attacks.
Exploitability: Exploitation is relatively easy for an attacker with access to a site using the Conversations tool, as any authenticated user can inject malicious content.
Blast radius: If exploited, the XSS attack can affect all users viewing the affected topic or post, potentially leading to data theft or further attacks.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to Sakai version 23.5, 25.3, or 26.0 or later.

xsswebauth-requiredsakai

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Weaknesses

CWE-79

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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