Strategic Overview
- Status
- Patched in 1.4.6
- Affected Plugin
- Carts Guru
- Affected Version
<= 1.4.5- CVSS
- 9.8Critical
- Weakness type
- CWE-502 · Deserialization of Untrusted Data
- CVE
CVE-2019-12241
At a glance
CVE-2019-12241 is a critical-severity Deserialization of Untrusted Data vulnerability in the Carts Guru WordPress plugin, affecting versions <= 1.4.5. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 1.4.6; sites on affected versions should update now. Disclosed May 2019, reported by Magnus K. Stubman.
Vulnerability Overview
The Carts Guru plugin 1.4.5 for WordPress allows Insecure Deserialization via a cartsguru-source cookie to classes/wc-cartsguru-event-handler.php.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-502: Deserialization of Untrusted Data
Reaching this weakness in Carts Guru <= 1.4.5 takes a caller who can reach the endpoint. Deserialization of untrusted data means the application reconstructs objects from input a caller controls, letting the attacker choose which classes get instantiated and what their properties hold.
A workable chain turns deserialization into file writes, deletions or code execution, depending on what the loaded classes do in their magic methods. For Carts Guru the fix is 1.4.6: builds <= 1.4.5 are affected, anything from 1.4.6 onward is not.
Remediation
Update to version 1.4.6, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Carts Guru: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Carts Guru 1.4.6 closes this, and updating the plugin is the step that ends it.
- Firewall
- Scanner
- Alerts
External References
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