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GHSA-g82f-9pw7-773w

Concrete CMS: PHP Object Injection via unserialize() calls

Source: GitHub Advisory Database (reviewed) High CVE-2026-10721

Packages

EcosystemPackageAffectedFixed in
Packagist concrete5/concrete5 < 9.5.2 9.5.2

Details

As written in the advisory (Markdown source, shown as plain text).

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize() calls in the  in Permission, Cache, and Search components. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been placed in the database. Concrete CMS thanks XananasX7 for reporting this issue.

References

External links from the advisory. They lead to third-party sites.