CVE-2026-45275: CWE-285: Improper Authorization in nextcloud security-advisories
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.
AI Analysis
Technical Summary
Nextcloud's Approval app before version 2.7.2 contains an improper authorization vulnerability (CWE-285) that permits users lacking sharing permissions to escalate privileges by causing the system to share files with approvers. This results in an authorization bypass, allowing unauthorized users to distribute restricted content. The vulnerability has a CVSS 3.1 base score of 6.5, indicating a medium severity level. The flaw is fixed in version 2.7.2 of the Approval app.
Potential Impact
Exploitation of this vulnerability allows unauthorized users to bypass sharing restrictions and distribute files they should not have access to. This compromises confidentiality by enabling unauthorized file sharing. There is no indication of impact on integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade the Nextcloud Approval app to version 2.7.2 or later, where this vulnerability has been patched. Since the vendor advisory confirms the fix in 2.7.2, applying this update fully mitigates the issue. No additional mitigation steps are indicated.
CVE-2026-45275: CWE-285: Improper Authorization in nextcloud security-advisories
Description
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Nextcloud's Approval app before version 2.7.2 contains an improper authorization vulnerability (CWE-285) that permits users lacking sharing permissions to escalate privileges by causing the system to share files with approvers. This results in an authorization bypass, allowing unauthorized users to distribute restricted content. The vulnerability has a CVSS 3.1 base score of 6.5, indicating a medium severity level. The flaw is fixed in version 2.7.2 of the Approval app.
Potential Impact
Exploitation of this vulnerability allows unauthorized users to bypass sharing restrictions and distribute files they should not have access to. This compromises confidentiality by enabling unauthorized file sharing. There is no indication of impact on integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade the Nextcloud Approval app to version 2.7.2 or later, where this vulnerability has been patched. Since the vendor advisory confirms the fix in 2.7.2, applying this update fully mitigates the issue. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-11T18:41:13.157Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1de306e29bf47b503a5501
Added to database: 6/1/2026, 7:52:38 PM
Last enriched: 6/1/2026, 7:54:33 PM
Last updated: 6/2/2026, 7:16:59 AM
Views: 7
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