What’s Vulnerable › Vulnerabilities

CVE-2024-52509: Nextcloud Mail app does not respect download permissions in shares

• Severity: medium (CVSS 5.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% 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-284

Description

Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. The Nextcloud mail app incorrectly allowed attaching shared files without download permissions as attachments. This allowed users to send them the files to themselves and then downloading it from their mail clients. It is recommended that the Nextcloud Mail is upgraded to 2.2.10, 3.6.2 or 3.7.2.

Affected products

• nextcloud Mail: from 2.2.0 before 2.2.10; from 3.6.0 before 3.6.2; from 3.7.0 before 3.7.2 — fixed in 2.2.10, 3.6.2, 3.7.2

How to fix

Upgrade to a fixed version: nextcloud Mail 2.2.10, 3.6.2, 3.7.2. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/mail/commit/8d44f1ce44684022aa4e62a3e0462fdadcde6c8b
• https://github.com/nextcloud/mail/pull/9592
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pwpp-fvcr-w862
• https://hackerone.com/reports/1878255

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