Unrestricted file upload in hovanesvn AP Background
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
The AP Background plugin for WordPress is vulnerable to arbitrary file uploads due to missing authorization and insufficient file validation within the advParallaxBackAdminSaveSlider() handler in versions 3.8.1 to 3.8.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
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
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-9561
- 2026-10-03 Alias added: GHSA-cgpg-6265-g3wp
- 2026-10-23 EPSS moved to the 50th–90th percentile
References
More hovanesvn vulnerabilities
- TI-2025-09331 AP Background <= 3.8.2 - Authenticated (Contributor+) Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.4
- TI-2025-09082 AP Background <= 3.8.2 - Cross-Site Request Forgery CVSS 3.1MEDIUM 4.3
Sources
- CVE-2025-9561 · CVE Program
- CVE-2025-9561 · NVD
- FIRST EPSS
- GHSA-cgpg-6265-g3wp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences