CVE-2025-3434 SMTP for Amazon SES – YaySMTP <= 1.8 - Unauthenticated Stored Cross-Site Scripting via Email Logs
Unauthenticated attackers can inject arbitrary web scripts via email logs in the YaySMTP WordPress plugin, leading to potential code execution when users view the logs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-3434?
CVE-2025-3434 is a high-severity cross-site scripting vulnerability in yaycommerce SMTP for Amazon SES – YaySMTP, published on 11 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The SMTP for Amazon SES – YaySMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Email Logs in all versions up to, and including, 1.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2025-3434?
How do I fix CVE-2025-3434?
No fix has been published for CVE-2025-3434 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-2025-3434 being exploited?
There is no known exploitation of CVE-2025-3434 in the wild and no public exploit code.
Sources
Also known as GHSA-fj54-r6pm-4r48.