CVE-2022-2256

Visualizer: Tables and Charts Manager for WordPress <= 3.7.9 - Authenticated (Contributor+) PHAR Deserialization

2022-07-05 00:00
Anonymous

Strategic Overview

Status
Patched in 3.7.10
Affected Plugin
Visualizer – Tables & Charts Manager with Built-in AI Generator
Affected Version
<= 3.7.9
CVSS
8.8High
Weakness type
CWE-502 · Deserialization of Untrusted Data
CVE
CVE-2022-2256
View all Visualizer – Tables & Charts Manager with Built-in AI Generator vulnerabilities

At a glance

CVE-2022-2256 is a high-severity Deserialization of Untrusted Data vulnerability in the Visualizer WordPress plugin, affecting versions <= 3.7.9. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 3.7.10; sites on affected versions should update now. Disclosed July 2022.

Vulnerability Overview

The Visualizer: Tables and Charts Manager for WordPress plugin for WordPress is vulnerable to deserialization of untrusted input via the 'remote_data' parameter in the file Block.php in versions up to, and including 3.7.9. This makes it possible for authenticated attackers with contributor privileges and above to call files using a PHAR wrapper that will deserialize the data and call arbitrary PHP Objects that can be used to perform a variety of malicious actions granted a POP chain is also present. It also requires that the attacker is successful in uploading a file with the serialized payload.

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 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

Visualizer <= 3.7.9 carries this weakness at remote_data, and reaching it takes an account at Contributor level or above. 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 Visualizer the fix is 3.7.10: builds <= 3.7.9 are affected, anything from 3.7.10 onward is not.

Remediation

Update to version 3.7.10, or a newer patched version

How does WordSec protect against this?

An attacker needs Contributor access first, so the firewall sees the attempt as traffic from a logged-in account: 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: Visualizer 3.7.10 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-2256https://www.wordfence.com/threat-intel/vulnerabilities/id/d25ed357-2895-47c7-9418-628068c6d18ehttps://nvd.nist.gov/vuln/detail/CVE-2022-2256

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C