CVE-2026-15516 MacCMS Pro Installation Index.php step5 authorization
Attackers can bypass authorization in the MacCMS Pro installation module to gain elevated privileges, requiring a software upgrade to fix.
- 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-2026-15516?
CVE-2026-15516 is a medium-severity authentication bypass vulnerability in MacCMS Pro, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was detected in MacCMS Pro up to 2022.1000.3005. Impacted is the function step5 of the file application/install/controller/Index.php of the component Installation Module. The manipulation results in authorization bypass. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is considered difficult. The exploit is now public and may be used. Upgrading to version 2022.1000.3025 is recommended to address this issue. Upgrading the affected component is recommended.
Which versions are affected by CVE-2026-15516?
How do I fix CVE-2026-15516?
No fix has been published for CVE-2026-15516 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-15516 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15516 exists.
Sources
Also known as GHSA-r7c2-xcmm-m4pr.