CVE-2024-6756

Social Auto Poster <= 5.3.14 - Authenticated (Contributor+) Arbitrary File Upload

2024-07-23 00:00
István Márton

Strategic Overview

Status
Patched in 5.3.15
Affected Plugin
Social Auto Poster
Affected Version
<= 5.3.14
CVSS
8.8High
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE-2024-6756
View all Social Auto Poster vulnerabilities

At a glance

CVE-2024-6756 is a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Social Auto Poster WordPress plugin, affecting versions <= 5.3.14. 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 5.3.15; sites on affected versions should update now. Disclosed July 2024, reported by István Márton.

Vulnerability Overview

The Social Auto Poster plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'wpw_auto_poster_get_image_path' function in all versions up to, and including, 5.3.14. This makes it possible for authenticated attackers, with Contributor-level and above permissions, to upload arbitrary files on the affected site's server which may make remote code execution possible. An attacker can use CVE-2024-6754 to exploit with subscriber-level access.

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-434: Unrestricted Upload of File with Dangerous Type

Social Auto Poster <= 5.3.14 carries this weakness at wpw_auto_poster_get_image_path, and reaching it takes an account at Contributor level or above. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.

If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For Social Auto Poster the fix is 5.3.15: builds <= 5.3.14 are affected, anything from 5.3.15 onward is not.

Remediation

Update to version 5.3.15, 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: Social Auto Poster 5.3.15 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-6756https://www.wordfence.com/threat-intel/vulnerabilities/id/24e00c0d-08ff-4c68-a1dd-77b513545efdhttps://nvd.nist.gov/vuln/detail/CVE-2024-6756

Related records

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