CVE-2026-16573 Bit Form < 3.2.0 - Unauthenticated Stored XSS via SVG Signature Upload
Unauthenticated attackers can upload malicious SVG files to execute JavaScript in victim browsers via stored XSS in the Bit Form plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-16573?
CVE-2026-16573 is a high-severity cross-site scripting vulnerability in Unknown Bit Form, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Bit Form WordPress plugin before 3.2.0 does not sanitize an uploaded signature image before storing it, allowing unauthenticated attackers to upload a crafted SVG file containing JavaScript that executes when the file is viewed, leading to Stored Cross-Site Scripting.
Weakness: CWE-79
Which versions are affected by CVE-2026-16573?
How do I fix CVE-2026-16573?
No fix has been published for CVE-2026-16573 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-2026-16573 being exploited?
There is no known exploitation of CVE-2026-16573 in the wild and no public exploit code.
Sources
Also known as GHSA-5prm-g28p-frm9.