CVE-2026-3353 Comment SPAM Wiper <= 1.2.1 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'API Key' Setting
Administrators can inject scripts via API Key setting in WordPress plugin, affecting multi-site or unfiltered_html disabled installations.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3353?
CVE-2026-3353 is a medium-severity cross-site scripting vulnerability in intermod Comment SPAM Wiper, published on 21 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Comment SPAM Wiper plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'API Key' setting in all versions up to, and including, 1.2.1. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Weakness: CWE-79
Which versions are affected by CVE-2026-3353?
How do I fix CVE-2026-3353?
No fix has been published for CVE-2026-3353 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-2026-3353 being exploited?
There is no known exploitation of CVE-2026-3353 in the wild and no public exploit code.
Sources
Also known as GHSA-5j54-r8cm-hmwx.