Sakai Conversations has a Stored XSS Issue
Published Oct 1, 2026
8.7
HIGHCVSS 3.1
EPSS 0.03%
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.
Affected products
-
- Version >= 23.0, < 23.5StatusaffectedConstraints-
- Version >= 25.0, < 25.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sakaiproject | Sakai | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Jun 12, 2026.
Score over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
Percentile over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
References (4)
- https://github.com/advisories/GHSA-w2x5-gv52-9ccv Advisory
- https://github.com/sakaiproject/sakai/commit/2696b4b48cbef2e81512f52f84f7477adff78b27 x_refsource_MISC
- https://github.com/sakaiproject/sakai/releases/tag/23.5
- https://github.com/sakaiproject/sakai/security/advisories/GHSA-w2x5-gv52-9ccv x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-w2x5-gv52-9ccv | Advisory | |
| https://github.com/sakaiproject/sakai/commit/2696b4b48cbef2e81512f52f84f7477adff78b27 | x_refsource_MISC | |
| https://github.com/sakaiproject/sakai/releases/tag/23.5 | ||
| https://github.com/sakaiproject/sakai/security/advisories/GHSA-w2x5-gv52-9ccv | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.