How severe is CVE-2025-0521?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2025-0521 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Saadiqbal Post Smtp – Complete Email Deliverability And Solution With Logs, Alerts, Backup & Mobile App

CVE-2025-0521

The Post SMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the from and subject parameter in all versions up to, and including, 3.0.2 due to insufficient input sanitization and output escaping. This makes it possib…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (61.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Saadiqbal Post Smtp – Complete Email Deliverability And Solution With Logs, Alerts, Backup & Mobile App — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-0521?: CVE-2025-0521 is a high-severity vulnerability in Saadiqbal Post Smtp – Complete Email Deliverability And Solution With Logs, Alerts, Backup & Mobile App, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2025-02-18.
How severe is CVE-2025-0521?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2025-0521 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.