Reflected cross-site scripting in WP User Frontend plugin
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
The User Frontend WordPress plugin before 4.3.14 does not sanitise and escape some user-supplied values before reflecting them into HTML attributes in a publicly reachable AJAX response (CWE-79). The action is gated by an anonymous nonce that only validates for logged-out requests, so an unauthenticated remote attacker can run script in the browser of logged-out visitors. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-11-05
Description from the CNA
The User Frontend WordPress plugin before 4.3.14 does not sanitise and escape some user-supplied values before reflecting them into HTML attributes in a publicly reachable AJAX response, leading to Reflected Cross-Site Scripting. The affected action is gated by an anonymous nonce that only validates for logged-out requests, so the payload executes against logged-out visitors rather than authenticated users.
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 |
|---|---|---|---|---|---|
| Unknown | User Frontend | before 4.3.14 | 4.3.14 | Patch available | CNA |
- User Frontend VendorUnknown Affected before 4.3.14 Fixed in 4.3.14 Patch available CNA
Remediation
Update the User Frontend plugin to version 4.3.14, the fixed version for the range before 4.3.14.
Written with Claude Haiku 5.5 from the sources below · 2026-11-05
- Fix · CNA User Frontend (Unknown) Fixed in 4.3.14
Timeline
- 2026-10-30 Threatist record created from CVE-2026-115277
- 2026-10-30 Alias added: GHSA-5xcm-rr4h-p45v
- 2026-10-30 CVSS score added · CISA ADP
- 2026-10-30 Weakness changed · CISA ADP
- 2026-10-30 CISA SSVC decision points changed
References
Sources
- CVE-2026-115277 · CVE Program
- CVE-2026-115277 · NVD
- FIRST EPSS
- GHSA-5xcm-rr4h-p45v · 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