CVE-2023-28845— Chat room membership disclosed via autocompletion in Nextcloud talk
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I. Basic Information for CVE-2023-28845
Vulnerability Information
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Vulnerability Title
Chat room membership disclosed via autocompletion in Nextcloud talk
Source: NVD (National Vulnerability Database)
Vulnerability Description
Nextcloud talk is a video & audio conferencing app for Nextcloud. In affected versions the talk app does not properly filter access to a conversations member list. As a result an attacker could use this vulnerability to gain information about the members of a Talk conversation, even if they themselves are not members. It is recommended that the Nextcloud Talk is upgraded to 14.0.9 or 15.0.4. There are no known workarounds for this vulnerability.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud talk存在访问控制错误漏洞，该漏洞源于无法正确过滤对用户列表的访问。攻击者利用该漏洞获取有关Talk对话成员的信息。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| nextcloud | security-advisories | >= 15.0.0, < 15.0.4 | - |
II. Public POCs for CVE-2023-28845
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/nextcloud/spreed/pull/8651x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2023-28845
Same Patch Batch · nextcloud · 2023-03-31 · 3 CVEs total
| CVE-2023-28844 | 5.7 MEDIUM | User without download rights can download older version of that file in nextcloud server |
| CVE-2023-28645 | 5.7 MEDIUM | Secure view can be bypassed by using internal API endpoint in Nextcloud richdocuments |
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V. Comments for CVE-2023-28845
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