Stored Cross-Site Scripting in Sakai Conversations Tool by Sakai
CVE-2026-54049

8.7HIGH

Key Information:

Vendor

Sakaiproject

Status
Sakai
Vendor
CVE Published:
1 October 2026

What is CVE-2026-54049?

The Sakai Conversations tool, part of the Collaboration and Learning Environment (CLE), is susceptible to stored cross-site scripting (XSS) attacks due to inadequate HTML sanitization in topics and post messages. This vulnerability affects users in Sakai versions 23.0 through 23.5 and 25.0 through 25.3, allowing any authenticated user to inject harmful HTML and JavaScript. Once injected, this malicious content can execute in the browsers of all other users viewing the affected topic or post. It is crucial for users to upgrade to the patched versions 23.5, 25.3, or 26.0 to mitigate this risk.

Affected Version(s)

sakai >= 23.0, < 23.5 < 23.0, 23.5

sakai >= 25.0, < 25.3 < 25.0, 25.3

References

https://github.com/sakaiproject/sakai/security/advisories...
x_refsource_CONFIRM
https://github.com/sakaiproject/sakai/commit/2696b4b48cbe...
x_refsource_MISC

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.