CVE-2025-3434
Published: 11 April 2025
Summary
CVE-2025-3434 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Wordpress (inferred from references). Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 20.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
The SMTP for Amazon SES – YaySMTP plugin for WordPress is vulnerable to stored cross-site scripting via email logs in all versions through 1.8. The flaw stems from insufficient input sanitization and output escaping on log data, allowing malicious content to be persisted and later rendered in administrative or viewing interfaces.
Unauthenticated attackers can exploit the issue over the network by triggering email processing that populates the logs with crafted payloads. Successful injection results in arbitrary script execution in the context of any user who later views the affected log pages, with the CVSS 7.2 rating reflecting no required credentials or user interaction and a scope change that can impact other site components.
The referenced Wordfence advisory and WordPress plugin changeset 3270161 document the availability of a fix that addresses the sanitization gaps; site administrators should update to a patched release and review stored email logs for prior injection attempts. The associated EPSS score has remained low, with a peak of only 0.0167.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10738
Vulnerability details
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…
more
unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.