What’s Vulnerable › Vulnerabilities

CVE-2023-26041: Nextcloud Talk messages can still be seen on conversation after expiring when cron is misconfigured

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-02-27 · updated 2026-06-17
• Weakness: CWE-359

Description

Nextcloud Talk is a fully on-premises audio/video and chat communication service. When cron jobs were misconfigured and therefore messages are not expired, the API would still return them while they were then hidden by the frontend code. It is recommended that the Nextcloud Talk is upgraded to 15.0.3. There are no workaround available.

Affected products

• Nextcloud Talk: from 15.0.0 before 15.0.3 — fixed in 15.0.3

How to fix

Upgrade to a fixed version: Nextcloud Talk 15.0.3. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j53p-r755-v4jf
• https://github.com/nextcloud/spreed/pull/8515
• https://hackerone.com/reports/1784310
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j53p-r755-v4jf
• https://github.com/nextcloud/spreed/pull/8515
• https://hackerone.com/reports/1784310

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