Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2023-28845— Chat room membership disclosed via autocompletion in Nextcloud talk

Quick assessment

Affected
nextcloud security-advisories
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 3.5 · Low EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2023-28845

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Chat room membership disclosed via autocompletion in Nextcloud talk
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
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
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2023-28845

请登录查看更多情报信息。

Patches & Fixes for CVE-2023-28845 (1)

Vendor Advisories for CVE-2023-28845 (1)

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

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-284

V. Comments for CVE-2023-28845

No comments yet

Leave a comment