CVE-2026-50740 Cross-site scripting in Adserver
A low-privileged user can execute reflected XSS attacks via the refresh parameter in Revive Adserver, potentially compromising user sessions.
- 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-2026-50740?
CVE-2026-50740 is a medium-severity cross-site scripting vulnerability in Revive-Adserver Revive Adserver, published on 26 Jun 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
A missing sanitisation vulnerability of user input in the zone-include.php script exists in Revive Adserver 6.0.7 and earlier. A low‑privileged user could exploit the refresh parameter of the iFrame invocation tag to perform reflected XSS attacks.
Weakness: CWE-79
Which versions are affected by CVE-2026-50740?
It affects 1 product.
Products include Revive-Adserver Revive Adserver.
How do I fix CVE-2026-50740?
No fix has been published for CVE-2026-50740 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-2026-50740 being exploited?
There is no known exploitation of CVE-2026-50740 in the wild and no public exploit code.
Other vulnerabilities in Revive-Adserver Revive Adserver
- CVE-2016-9124 Security feature bypass in Revive Adserver All versions before 3.2.3
- CVE-2016-9125 Auth bypass in Revive Adserver All versions before 3.2.3
- CVE-2017-5830 Deserialization in n/a
- CVE-2016-9470 Other in Revive Adserver All versions before 3.2.5 and 4.0.0
- CVE-2026-50741 Code injection in Adserver
Sources
Also known as GHSA-w359-3g2m-wx65.