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CVE-2024-52520

Nextcloud Server's link reference provider can be tricked into downloading bigger files than intended

MEDIUM
6.5
CVSS Score
Published: November 15, 2024 at 04:41 PM UTC
Updated: June 17, 2026 at 08:07 AM UTC
1 product affected across 1 vendorNextcloud/server

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

Nextcloud Server is a self hosted personal cloud system. Due to a pre-flighted HEAD request, the link reference provider could be tricked into downloading bigger websites than intended, to find open-graph data. It is recommended that the Nextcloud Server is upgraded to 28.0.10 or 29.0.7 and Nextcloud Enterprise Server is upgraded to 27.1.11.8, 28.0.10 or 29.0.7.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nextcloud/server· Nextcloudnextcloud-app
95%
27.0.0 ≤ v < 27.1.11.828.0.0 ≤ v < 28.0.1029.0.0 ≤ v < 29.0.7
Affected range stops below 27.1.11.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 28.0.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 29.0.7, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxqf-cfxw-mqmj
x_refsource_MISCPatch
Source: [email protected]
https://github.com/nextcloud/server/commit/873c42b0f1383d5b6f2b7a481e1d9620ed30f44a
x_refsource_MISCPatch
Source: [email protected]
https://github.com/nextcloud/server/pull/47627

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-400CWE-79

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