Vulnerability Description
OpenSlides is a free, Web-based presentation and assembly system for managing and projecting agenda, motions, and elections of assemblies. OpenSlides version 3.2, due to unsufficient user input validation and escaping, it is vulnerable to persistant cross-site scripting (XSS). In the web applications users can enter rich text in various places, e.g. for personal notes or in motions. These fields can be used to store arbitrary JavaScript Code that will be executed when other users read the respective text. An attacker could utilize this vulnerability be used to manipulate votes of other users, hijack the moderators session or simply disturb the meeting. The vulnerability was introduced with 6eae497abeab234418dfbd9d299e831eff86ed45 on 16.04.2020, which is first included in the 3.2 release. It has been patched in version 3.3 ( in commit f3809fc8a97ee305d721662a75f788f9e9d21938, merged in master on 20.11.2020).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openslides | Openslides | 3.2 |
Related Weaknesses (CWE)
References
- https://github.com/OpenSlides/OpenSlides/blob/master/CHANGELOG.rst#version-33-20Release NotesThird Party Advisory
- https://github.com/OpenSlides/OpenSlides/commit/f3809fc8a97ee305d721662a75f788f9PatchThird Party Advisory
- https://github.com/OpenSlides/OpenSlides/pull/5714PatchThird Party Advisory
- https://github.com/OpenSlides/OpenSlides/security/advisories/GHSA-w5wr-98qm-jx92Third Party Advisory
- https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2020-043.tBroken Link
- https://github.com/OpenSlides/OpenSlides/blob/master/CHANGELOG.rst#version-33-20Release NotesThird Party Advisory
- https://github.com/OpenSlides/OpenSlides/commit/f3809fc8a97ee305d721662a75f788f9PatchThird Party Advisory
- https://github.com/OpenSlides/OpenSlides/pull/5714PatchThird Party Advisory
- https://github.com/OpenSlides/OpenSlides/security/advisories/GHSA-w5wr-98qm-jx92Third Party Advisory
- https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2020-043.tBroken Link
FAQ
What is CVE-2020-26280?
CVE-2020-26280 is a vulnerability with a CVSS score of 8.9 (HIGH). OpenSlides is a free, Web-based presentation and assembly system for managing and projecting agenda, motions, and elections of assemblies. OpenSlides version 3.2, due to unsufficient user input valida...
How severe is CVE-2020-26280?
CVE-2020-26280 has been rated HIGH with a CVSS base score of 8.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-26280?
Check the references section above for vendor advisories and patch information. Affected products include: Openslides Openslides.