What’s Vulnerable › Vulnerabilities

CVE-2024-52510: Nextcloud Desktop client behaves incorrectly if the initial end-to-end-encryption signature is empty

• Severity: high (CVSS 7.5 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: none known
• Published: 2024-11-15 · updated 2026-06-17
• Weakness: CWE-295

Description

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. The Desktop client did not stop with an error but allowed by-passing the signature validation, if a manipulated server sends an empty initial signature. It is recommended that the Nextcloud Desktop client is upgraded to 3.14.2 or later.

Affected products

• Desktop Client: from 3.0.0 before 3.14.2 — fixed in 3.14.2

How to fix

Upgrade to a fixed version: Desktop Client 3.14.2. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/desktop/commit/97539218e6f63c3a3fd1694cb7d8aef27c5910d7
• https://github.com/nextcloud/desktop/pull/7333
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r4qc-m9mj-452v
• https://hackerone.com/reports/2597504

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