CVE-2026-25519
OpenSlides is a free, web based presentation and assembly system for managing and projecting agenda, motions and elections of an assembly.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
OpenSlides is a free, web based presentation and assembly system for managing and projecting agenda, motions and elections of an assembly. Prior to version 4.2.29, OpenSlides supports local logins with username and password or an optionally configurable single sign on with SAML via an external IDP. For users synced to OpenSlides via an external IDP, there is an incorrect access control regarding the local login of these users. Users can successfully login using the local login form and the OpenSlides username of a SAML user and a trivial password. This password is valid for all SAML users. This issue has been patched in version 4.2.29.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.51% probability · 42th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-284
- Affected
- openslides/openslides
- Source
- security-advisories@github.com
References
- https://github.com/OpenSlides/OpenSlides/releases/tag/4.2.29Product, Release Notes
- https://github.com/OpenSlides/OpenSlides/security/advisories/GHSA-vv4h-8wfc-pf8cPatch, Vendor Advisory
- https://github.com/OpenSlides/openslides-auth-service/commit/70c1aa9f5e1db59ec120ecce98d1c1169350a4eePatch
- https://github.com/OpenSlides/openslides-auth-service/pull/889Issue Tracking
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.