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CVE-2023-30540— Chat poll data can still be queried from API after purging history 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 15.0.5之前版本存在信息泄露漏洞，该漏洞源于后来添加到对话中的用户可以访问在添加到对话之前已删除的数据。

CVSS 3.5 · Low EPSS 0.66% · P48

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2023-30540

Vulnerability Information
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Vulnerability Title
Chat poll data can still be queried from API after purging history in Nextcloud talk
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Talk is a chat, video & audio call extension for Nextcloud. In affected versions a user that was added later to a conversation can use this information to get access to data that was deleted before they were added to the conversation. This issue has been patched in version 15.0.5 and it is recommended that users upgrad to 15.0.5. There are no known workarounds for this issue.
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
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 信息泄露漏洞
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 15.0.5之前版本存在信息泄露漏洞，该漏洞源于后来添加到对话中的用户可以访问在添加到对话之前已删除的数据。
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, < 15.0.5 -

II. Public POCs for CVE-2023-30540

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III. Intelligence Information for CVE-2023-30540

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Patches & Fixes for CVE-2023-30540 (1)

Vendor Advisories for CVE-2023-30540 (1)

Other References for CVE-2023-30540 (1)

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-200

V. Comments for CVE-2023-30540

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