Strategic Overview
- Status
- Unpatched
- Affected Plugin
- Advanced Advertising System
- Affected Version
<= 1.3.1- CVSS
- 6.1Medium
- Weakness type
- CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
- CVE
CVE-2025-3433
At a glance
CVE-2025-3433 is a medium-severity URL Redirection to Untrusted Site ('Open Redirect') vulnerability in the Advanced Advertising System WordPress plugin, affecting versions <= 1.3.1. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed April 2025, reported by Gabriele Zuddas.
Vulnerability Overview
The Advanced Advertising System plugin for WordPress is vulnerable to Open Redirect in all versions up to, and including, 1.3.1. This is due to insufficient validation on the redirect url supplied via the 'redir' parameter. This makes it possible for unauthenticated attackers to redirect users to potentially malicious sites if they can successfully trick them into performing an action.
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 privileges on the target site.
CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Advanced Advertising System <= 1.3.1 carries this weakness at redir, and reaching it takes a caller who can reach the endpoint. An open redirect is a page that takes a destination from the request and sends the browser there without checking that the destination belongs to the site.
A link that starts on a trusted domain finishes on an attacker's, which is what makes phishing and consent-screen abuse credible to the person clicking it. No fixed build of this plugin is recorded for Advanced Advertising System yet, so installs running <= 1.3.1 stay exposed until the vendor ships one.
Remediation
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
How does WordSec protect against this?
The attempt arrives as an ordinary request to Advanced Advertising System: WordSec's web application firewall inspects request payloads before WordPress loads them. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in Advanced Advertising System
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