CVE-2026-71503 Dolibarr < 24.0.0 Reflected XSS via Extra Fields Administration Template
An unauthenticated attacker can execute arbitrary JavaScript in an administrator's session via a crafted URL, leading to privilege escalation and account creation.
- 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-2026-71503?
CVE-2026-71503 is a medium-severity cross-site scripting vulnerability in dolibarr, published on 24 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
Dolibarr before 24.0.0 contains a reflected cross-site scripting vulnerability in the extra fields administration template where the type request parameter is echoed without JavaScript-context encoding into an inline script block and no Content-Security-Policy header is emitted. An unauthenticated attacker can cause an authenticated administrator to open a crafted URL to execute arbitrary JavaScript in that session and create a persistent administrator account.
Weakness: CWE-79
Which versions are affected by CVE-2026-71503?
How do I fix CVE-2026-71503?
No fix has been published for CVE-2026-71503 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-2026-71503 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-71503 exists.
Sources
Also known as GHSA-6c4p-988c-4wgf.