CVE-2025-4776 Phlox <= 2.17.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via `data-caption` HTML Attribute
Authenticated attackers can inject arbitrary scripts via the data-caption attribute, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-4776?
CVE-2025-4776 is a medium-severity cross-site scripting vulnerability in averta Phlox, published on 6 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Phlox theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `data-caption` HTML attribute in all versions up to, and including, 2.17.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2025-4776?
How do I fix CVE-2025-4776?
No fix has been published for CVE-2025-4776 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-2025-4776 being exploited?
There is no known exploitation of CVE-2025-4776 in the wild and no public exploit code.
Sources
Also known as GHSA-98r3-6xf8-x8r5.