CVE-2026-85657 Cross-site scripting in Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors
Authenticated attackers with Author-level access can inject arbitrary scripts via the profile_fields_user_email_value_prefix parameter, leading to stored XSS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-85657?
CVE-2026-85657 is a medium-severity cross-site scripting vulnerability in Co-Authors, Multiple Authors and Guest Authors in an Author Box with PublishPress Authors, published on 15 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-85657?
How do I fix CVE-2026-85657?
No fix has been published for CVE-2026-85657 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-85657 being exploited?
There is no known exploitation of CVE-2026-85657 in the wild and no public exploit code.
Sources
Also known as GHSA-786g-g6vf-28p6.