Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openslides | Openslides | < 4.2.5 |
Related Weaknesses (CWE)
References
- https://www.x41-dsec.de/lab/advisories/x41-2025-001-OpenSlidesExploitThird Party Advisory
FAQ
What is CVE-2025-30342?
CVE-2025-30342 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 all...
How severe is CVE-2025-30342?
CVE-2025-30342 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-30342?
Check the references section above for vendor advisories and patch information. Affected products include: Openslides Openslides.