QA Assistants <= 5.3.0 - Unauthenticated PHP Object Injection to Remote Code Execution via 'raw_name' and 'dlevent_ver' Parameters
Summary
| CVE | CVE-2026-87112 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-07 07:17:05 UTC |
| Updated | 2026-11-08 19:17:42 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.007950000 probability, percentile 0.566810000 (date 2026-11-09)
Problem Types: CWE-502 | CWE-502 CWE-502 Deserialization of Untrusted Data
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Quarka | QA Assistants Driven By Data | affected 5.3.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-cron-pro... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-base.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-core-bas... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-behavior... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/vendor/guzzlehttp/g... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/qahm-ajax.php | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/76c5b5f1-a04b-4219-b8c0-ee531... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-admin-pa... | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Supakiad S. (m3ez) (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-11-06T18:15:14.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.