CVE-2025-66556

3.5 LOW
Published: December 05, 2025 Modified: December 09, 2025
View on NVD

Description

Nextcloud talk is a video & audio conferencing app for Nextcloud. Prior to 20.1.8 and 21.1.2, a participant with chat permissions was able to delete poll drafts of other participants within the conversation based on their numeric ID. This vulnerability is fixed in 20.1.8 and 21.1.2.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh
Source: security-advisories@github.com
Patch Vendor Advisory
https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725
Source: security-advisories@github.com
Patch
https://github.com/nextcloud/spreed/pull/15532
Source: security-advisories@github.com
Issue Tracking Patch
https://hackerone.com/reports/3247386
Source: security-advisories@github.com
Issue Tracking Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
3.5 / 10.0
EPSS (Exploit Probability)
0.0%
1th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-639

Affected Vendors

nextcloud

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