Improper handling of request URLs in Nextcloud Guests app allows guest users to bypass app allowlist
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
Nextcloud guests app is a utility to create guest users which can only see files shared with them. In affected versions users were able to load the first page of apps they were actually not allowed to access. Depending on the selection of apps installed this may present a permissions bypass. It is recommended that the Guests app is upgraded to 2.4.1, 2.5.1 or 3.0.1. There are no known workarounds for this vulnerability.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nextcloud | security-advisories | 2.4.0 to before 2.4.1; 2.5.0 to before 2.5.1; 3.0.0 to before 3.0.1 | 2.4.1, 2.5.1, 3.0.1 | Patch available | CNA |
- security-advisories Vendornextcloud Affected 2.4.0 to before 2.4.1; 2.5.0 to before 2.5.1; 3.0.0 to before 3.0.1 Fixed in 2.4.1, 2.5.1, 3.0.1 Patch available CNA
Remediation
- Fix · CNA security-advisories (nextcloud) Fixed in 2.4.1, 2.5.1, 3.0.1
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2024-22402
References
More nextcloud Guests vulnerabilities
- TI-2024-14975 All users can reset the allowed apps list for Nextcloud Guest App users CVSS 3.1MEDIUM 4.3
Sources
- CVE-2024-22402 · CVE Program
- CVE-2024-22402 · NVD
- FIRST EPSS
- CVE-2024-22402 · Red Hat security data · CC BY 4.0
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