CVE-2026-87112

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.

Overview

State: PUBLISHED
Assigner (CNA): Wordfence
CVSS severity: HIGH
CVSS score: 8.8 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Effective score: 8.8 / 10 HIGH source: CNA overview
CWE(s): CWE-502
Reserved: 2026-09-08
Published: 2026-11-07 06:39 UTC
Last updated: 2026-11-07 06:39 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/87xxx/CVE-2026-87112.json
Linked Threat: CVE-2026-87112 — QA Assistants <= 5.3.0 - Unauthenticated PHP Object Injection to Remote Code Execution via 'raw_name' and 'dlevent_ver' Parameters

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-11-07 07:17:05 UTC
NVD last modified: 2026-11-07 07:17:05 UTC
NVD CVSS v3.1: 8.8 / 10 HIGH source: security@wordfence.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 2.8 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0080 (probability of exploitation in next 30 days)
EPSS percentile: 56.66% vs all CVEs — higher = more likely to be exploited, as of 2026-11-08

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-118966
Assigner: Wordfence
Published: Nov 7, 2026, 6:39:37 AM
Updated: Nov 7, 2026, 6:39:37 AM
EUVD base score (CVSS 3.1): 8.8 / 10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EUVD-reported EPSS: 0.8000
Vendors: quarka
Products: QA Assistants – Driven by data (0 ≤5.3.0)
Aliases: GHSA-6gfw-3qvp-fj85

ENISA 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.

EUVD references (9)

Affected products (1)

Vendor	Product	Versions	Platforms
quarka	QA Assistants – Driven by data	`0` (affected)	—

Vendor references (9)

References embedded in the original CVE record by the assigning CNA.

MITRE references (9) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (9)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-admin-page-realtime.php#L183 security@wordfence.com
https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-base.php#L701 security@wordfence.com
https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-behavioral-data.php#L770 security@wordfence.com
https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-core-base.php#L780 security@wordfence.com
https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-cron-proc.php#L698 security@wordfence.com
https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/qahm-ajax.php#L319 security@wordfence.com
https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/vendor/guzzlehttp/guzzle/src/Cookie/FileCookieJar.php#L38 security@wordfence.com
https://plugins.trac.wordpress.org/changeset?reponame=&old=3728466%40qa-heatmap-analytics&new=3728466%40qa-heatmap-analytics security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/76c5b5f1-a04b-4219-b8c0-ee53139fa787?source=cve security@wordfence.com

Indicators (1)

IOCs linked to the auto-promoted Threat row.

Type	Value	VirusTotal	Attached
cve	`CVE-2026-87112`	no local data	2026-11-06 20:19 UTC

Remediations (1)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Wordfence remediation: QA Assistants – Driven by data

Wordfence

Update to version 5.3.0.1, or a newer patched version

2026-11-06 20:19 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-87112.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "QA Assistants \u2013 Driven by data",
          "vendor": "quarka",
          "versions": [
            {
              "lessThanOrEqual": "5.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Supakiad S. (m3ez)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The QA Assistants \u2013 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502 Deserialization of Untrusted Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-07T06:39:37.565Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/76c5b5f1-a04b-4219-b8c0-ee53139fa787?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-base.php#L701"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-admin-page-realtime.php#L183"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/vendor/guzzlehttp/guzzle/src/Cookie/FileCookieJar.php#L38"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-cron-proc.php#L698"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-core-base.php#L780"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/qahm-ajax.php#L319"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/qa-heatmap-analytics/tags/5.2.0.1/class-qahm-behavioral-data.php#L770"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=&old=3728466%40qa-heatmap-analytics&new=3728466%40qa-heatmap-analytics"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-11-06T18:15:14.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "QA Assistants <= 5.3.0 - Unauthenticated PHP Object Injection to Remote Code Execution via 'raw_name' and 'dlevent_ver' Parameters"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-87112",
    "datePublished": "2026-11-07T06:39:37.565Z",
    "dateReserved": "2026-09-08T20:36:46.771Z",
    "dateUpdated": "2026-11-07T06:39:37.565Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}