Auto Upload Images <= 3.3.2 - Authenticated (Contributor+) Server-Side Request Forgery via 'src' Attribute of <img> Tags
Strategic Overview
- Status
- Patched in 3.4.0
- Affected Plugin
- Auto Upload Images
- Affected Version
<= 3.3.2- CVSS
- 6.4Medium
- Weakness type
- CWE-918 · Server-Side Request Forgery (SSRF)
- CVE
CVE-2026-12106
At a glance
CVE-2026-12106 is a medium-severity Server-Side Request Forgery (SSRF) vulnerability in the Auto Upload Images WordPress plugin, affecting versions <= 3.3.2. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 3.4.0; sites on affected versions should update now. Disclosed September 2026, reported by Scc2.
Vulnerability Overview
The Auto Upload Images plugin for WordPress is vulnerable to Limited Server-Side Request Forgery in all versions up to, and including, 3.3.2 via the downloadImage function. This makes it possible for authenticated attackers, with contributor-level access and above, to make web requests to arbitrary locations originating from the web application. The plugin uses wp_remote_get() rather than wp_safe_remote_get(), and the validate() method only rejects URLs whose host matches the site's own hostname, failing to block requests to private, loopback, or link-local addresses (e.g., 127.0.0.1, 10.0.0.0/8, 169.254.169.254). Attackers can trigger this by embedding a crafted <img> tag with a src attribute pointing to internal network hosts in post content and submitting it for processing.
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.
CWE-918: Server-Side Request Forgery (SSRF)
Auto Upload Images <= 3.3.2 carries this weakness at wp_remote_get(), and reaching it takes an account at Contributor level or above. Server-side request forgery means the application fetches a URL supplied by the caller, turning the server into a proxy for requests the attacker could not make directly.
The request originates from inside the hosting network, which is how these flaws reach cloud metadata endpoints, internal admin panels and services that trust local traffic. For Auto Upload Images the fix is 3.4.0: builds <= 3.3.2 are affected, anything from 3.4.0 onward is not.
Remediation
Update to version 3.4.0, 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. None of that substitutes for the fix: Auto Upload Images 3.4.0 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Auto Upload Images
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