Multiple elFinder Plugins - DOM-based XSS via postMessage Origin Bypass
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
The File Manager WordPress plugin before 8.0.5, FileOrganizer WordPress plugin before 1.2.1, File Manager Pro WordPress plugin before 2.1.3 do not correctly validate the origin of window messages received by the file browser they load on their admin screens, accepting any origin that is a leading string prefix of the site's own address, which allows an unauthenticated attacker to run arbitrary JavaScript in the session of a logged-in administrator who visits a page under their control. The defect is in the file-manager library all three bundle, and every version below 2.1.70 carries it. Updating the bundled library closes it.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| Unknown | File Manager | before 8.0.5 | 8.0.5 | Patch available | CNA |
| Unknown | FileOrganizer | before 1.2.1 | 1.2.1 | Patch available | CNA |
| Unknown | File Manager Pro | before 2.1.3 | 2.1.3 | Patch available | CNA |
- File Manager VendorUnknown Affected before 8.0.5 Fixed in 8.0.5 Patch available CNA
- FileOrganizer VendorUnknown Affected before 1.2.1 Fixed in 1.2.1 Patch available CNA
- File Manager Pro VendorUnknown Affected before 2.1.3 Fixed in 2.1.3 Patch available CNA
Remediation
- Fix · CNA File Manager (Unknown) Fixed in 8.0.5
- Fix · CNA FileOrganizer (Unknown) Fixed in 1.2.1
- Fix · CNA File Manager Pro (Unknown) Fixed in 2.1.3
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
File Manager 8.0.5
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-15987 File Manager 7.2.2 - 8.0.4 - Unauthenticated Database Backup DisclosurePriority LOW 26
Timeline
- 2026-10-02 Threatist record created from CVE-2026-85081
- 2026-10-03 Alias added: GHSA-hj83-mg7w-xg78
References
Sources
- CVE-2026-85081 · CVE Program
- CVE-2026-85081 · NVD
- FIRST EPSS
- GHSA-hj83-mg7w-xg78 · 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