Medium 4.3Published Dec 5, 2025

CVE-2025-66556Nextcloud talk is a video & audio conferencing app for Nextcloud.

Updated under an hour ago (2026-10-19 11:40 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for nextcloud talk

Exploited in the last 30 days

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.

CVSS: 4.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nextcloud talk nextcloud:talk	from 20.0.0 before 20.1.8; from 21.0.0 before 21.1.2	NVD

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jhpatch, vendor-advisory
https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725patch
https://github.com/nextcloud/spreed/pull/15532issue-tracking, patch
https://hackerone.com/reports/3247386issue-tracking, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.