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I. Basic Information for CVE-2025-66556
Vulnerability Information

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Vulnerability Title
Nextcloud talk allows participants to blindly delete poll drafts of other users by ID
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud Talk 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud Talk是德国Nextcloud公司的一款自托管的本地音频/视频和聊天通信服务。 Nextcloud talk 20.1.8之前版本和21.1.2之前版本存在安全漏洞,该漏洞源于具有聊天权限的参与者可删除他人投票草稿,可能导致数据篡改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
nextcloudsecurity-advisories < 20.1.8 -
II. Public POCs for CVE-2025-66556
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III. Intelligence Information for CVE-2025-66556
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