CVE-2025-50891 Cross-site scripting in server-side backend for Site Tracking
Attackers can inject HTML or execute arbitrary code via cookie hijacking in the Adform Site Tracking server-side backend.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-50891?
CVE-2025-50891 is a high-severity cross-site scripting vulnerability in Adform server-side backend for Site Tracking, published on 19 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The server-side backend for Adform Site Tracking before 2025-08-28 allows attackers to inject HTML or execute arbitrary code via cookie hijacking. NOTE: a customer does not need to take any action to update locally installed software (such as Adform Site Tracking 1.1).
Which versions are affected by CVE-2025-50891?
How do I fix CVE-2025-50891?
No fix has been published for CVE-2025-50891 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-2025-50891 being exploited?
There is no known exploitation of CVE-2025-50891 in the wild and no public exploit code.
Sources
Also known as GHSA-87jv-7r2h-c6wf.