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CVE-2026-87112

8.8, high

Quarka QA Assistants - Driven by data Deserialization of Untrusted Data Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.8, high high CVSS v3.1
EPSS, next 30 days
0.8% higher than 56.6% of scored CVEs
Exploitation
No public evidence
Published
7 Nov 2026yesterday

Description

The QA Assistants - Driven by data plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 5.3.0 via the 'dlevent_ver' parameter. This is due to unrestricted PHP deserialization via wrap_unserialize_static() calling unserialize() without an allowed_classes restriction, combined with serialize_escape() failing to sanitize path traversal sequences in the raw_name parameter. This makes it possible for unauthenticated attackers to inject a PHP Object. The Guzzle FileCookieJar gadget present in the plugin's bundled Composer dependencies can be leveraged to perform an Arbitrary File Write, writing attacker-controlled content to an attacker-chosen filename, which can result in Remote Code Execution. Exploitation requires triggering the qahm_cron_data_manage scheduled event via wp-cron.php to invoke the deserialization sink against a planted queue file, but this endpoint requires no authentication and fires automatically on a two-minute schedule.

Details

Vendor
Quarka
Product
QA Assistants - Driven by data
Weakness
CWE-502 (opens in a new tab)
Status
Deferred
Updated
7 Nov 2026
Assigner
security@wordfence.com

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References 9

Other references 9

1 more

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

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Is CVE-2026-87112 in your network?

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 8 Nov 2026, not the live upstream state.