CVE-2022-3360
Published: 31 October 2022
Summary
CVE-2022-3360 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Thimpress Learnpress. Its CVSS base score is 8.1 (High).
Operationally, ranked in the top 5.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
The LearnPress WordPress plugin before version 4.1.7.2 is affected by a deserialization flaw (CWE-502) in which user input is unserialized inside a REST API endpoint that is reachable by unauthenticated visitors. When a suitable gadget chain exists, the flaw permits PHP Object Injection that can be escalated to remote code execution. The CVSS 3.1 score is 8.1 with network attack vector and high attack complexity.
An unauthenticated attacker who also possesses knowledge of the site’s secrets can craft a valid hash via wp_hash() and supply a malicious serialized payload to the endpoint. Successful exploitation grants arbitrary code execution on the underlying WordPress installation.
The references point to WPScan entries that document the issue and identify the fixed release 4.1.7.2. The current EPSS of 0.1646 (peak 0.1799) indicates moderate but not sharply rising exploitation interest since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-42743
Vulnerability details
The LearnPress WordPress plugin before 4.1.7.2 unserialises user input in a REST API endpoint available to unauthenticated users, which could lead to PHP Object Injection when a suitable gadget is present, leadint to remote code execution (RCE). To successfully exploit…
more
this vulnerability attackers must have knowledge of the site secrets, allowing them to generate a valid hash via the wp_hash() function.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Evaluation of untrusted data handling (deserialization testing) reveals unsafe processing, which the required remediation process addresses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Validates or rejects untrusted serialized data before deserialization occurs.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Provenance of associated data allows detection of untrusted sources before deserialization or processing occurs.