Nextcloud Approval App up to 1.3.0/2.4.x improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.6$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Nextcloud Approval App up to 1.3.0/2.4.x. This affects an unknown part. Such manipulation leads to improper authentication. This vulnerability is documented as CVE-2025-66515. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Nextcloud Approval App up to 1.3.0/2.4.x. It has been rated as critical. Affected by this issue is an unknown code block. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Nextcloud Approval app allows approval or disapproval of files in the sidebar. Prior to 1.3.1 and 2.5.0, an authenticated user listed as a requester in a workflow can set another user’s file into the “pending approval” without access to the file by using the numeric file id. This vulnerability is fixed in 1.3.1 and 2.5.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2025-66515 since 12/03/2025. The exploitation is known to be easy. The attack may be launched remotely. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.3.1 or 2.5.0 eliminates this vulnerability. Applying the patch e30b56b7832255311ac800b7875f44866e88fff4 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 2.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Approval App 1.3.1/2.5.0
Patch: e30b56b7832255311ac800b7875f44866e88fff4

Timelineinfo

12/03/2025 CVE reserved
12/06/2025 +3 days Advisory disclosed
12/06/2025 +0 days VulDB entry created
12/06/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-q26g-fmjq-x5g5
Status: Confirmed

CVE: CVE-2025-66515 (🔒)
GCVE (CVE): GCVE-0-2025-66515
GCVE (VulDB): GCVE-100-334556

Entryinfo

Created: 12/06/2025 05:02
Changes: 12/06/2025 05:02 (67)
Complete: 🔍
Cache ID: 216::103

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