CVE-2026-44956 Cross-site scripting in Adserver
Low-privileged users can inject malicious scripts via their Full Name, which execute when admins view system-generated emails in the user log.
- 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-2026-44956?
CVE-2026-44956 is a cross-site scripting vulnerability in Revive Adserver, published on 23 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Low‑privileged users could use their Full Name as a vector for a stored XSS attack. The name is included in system‑generated emails, whose content is stored in the details field of the userlog table. An admin user viewing the email content through userlog-details.php would have any malicious JavaScript payload executed due to missing output sanitisation. Proper escaping has been added to the userlog details output.
Weakness: CWE-79
Which versions are affected by CVE-2026-44956?
How do I fix CVE-2026-44956?
No fix has been published for CVE-2026-44956 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-2026-44956 being exploited?
There is no known exploitation of CVE-2026-44956 in the wild and no public exploit code.
Sources
Also known as GHSA-55h8-q58m-2332.