CVE-2026-89424 Duplicate Post <= 1.5.6 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'noti_token' Parameter
Authenticated subscribers can inject arbitrary scripts via the noti_token parameter in the Duplicate Post plugin, requiring specific permission settings.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-89424?
CVE-2026-89424 is a medium-severity cross-site scripting vulnerability in inisev Duplicate Post, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Duplicate Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'noti_token' parameter in all versions up to, and including, 1.5.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires that the site owner has enabled the plugin's User Level Permissions for the Subscriber role, as this grants access to the i_saw_this_noti AJAX branch needed to deliver the payload.
Weakness: CWE-79
Which versions are affected by CVE-2026-89424?
How do I fix CVE-2026-89424?
No fix has been published for CVE-2026-89424 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-89424 being exploited?
There is no known exploitation of CVE-2026-89424 in the wild and no public exploit code.
Sources
Also known as GHSA-mjxg-mhjq-2vx5.