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GHSA-875v-7m49-8x88

HighCVSS 8.7 / 10
Published Apr 14, 2026·Last modified Apr 14, 2026
Affected Components(0)

No affected components available

Description

Summary

A SQL injection in the Commerce TotalRevenue widget can lead to remote code execution through a chain of four vulnerabilities:

  • SQL Injection -- The TotalRevenue stat interpolates unsanitized widget settings directly into a sprintf-based SQL Expression. Any control panel user can create any widget type without permission checks.

  • PDO Multi-Statement Queries -- PHP PDO MySQL enables CLIENT_MULTI_STATEMENTS by default. Neither Yii2 nor Craft CMS disables it. This allows stacking an INSERT statement after the injected SELECT , writing a maliciously serialized PHP object into the queue table.

  • Unrestricted unserialize() -- The yii2-queue PhpSerializer calls unserialize() with no allowed_classes restriction on every queue job. When the queue consumer processes the injected job, it instantiates the attacker-controlled object.

  • Gadget Chain (FileCookieJar) -- GuzzleHttp\Cookie\FileCookieJar (a standard Guzzle dependency) has an unguarded __destruct() method that calls file_put_contents(). The attacker’s serialized payload writes a PHP webshell to the server’s webroot. PHP tags survive json_encode() because Guzzle uses options=0 (no JSON_HEX_TAG).

The complete chain requires 3 HTTP requests and achieves arbitrary command execution as the PHP process user. Queue processing is triggered via GET /actions/queue/run, an endpoint that requires no authentication ($allowAnonymous = ['run']).

RCE Exploitation Steps

  • Authenticate as any control panel user
  • POST to /admin/actions/dashboard/create-widget with stacked SQL injection:
  • settings[type] contains the stacked INSERT with the serialized gadget chain
  • Response: HTTP 500 (expected -- INSERT already committed)
  • Trigger queue processing: GET /actions/queue/run
  • Queue consumer deserializes the gadget chain
  • FileCookieJar::__destruct() writes webshell to webroot
  • Access the webshell: GET /poc_rce.php?c=id
  • Response: uid=1000(home) gid=1000(home) groups=1000(home)
Risk Scores
Base Score
8.7

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
6.3

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.48%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity
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