CVE-2025-30342
Medium
Description
An XSS issue was discovered in OpenSlides before 4.2.5. When submitting descriptions such as Moderator Notes or Agenda Topics, an editor is shown that allows one to format the submitted text. This allows insertion of various HTML elements. When trying to insert a SCRIPT element, it is properly encoded when reflected; however, adding attributes to links is possible, which allows the injection of JavaScript via the onmouseover attribute and others. When a user moves the mouse over such a prepared link, JavaScript is executed in that user's session.
SeverityMedium
CVSS5.4
Exploit probability—
ProductOpenslides
PublishedMar 21, 2025
First seenMar 21, 2025
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- openslides openslides4.2.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openslides openslides | v < 4.2.5 | 4.2.5 |
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