CVE-2025-0521
Last modified
CVE-2025-0521 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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 possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
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 possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Wpexperts | Post Smtp | < 3.1.0 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-0521?
How severe is CVE-2025-0521?
How do I fix CVE-2025-0521?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-0514Improper Input Validation vulnerability in The Document Foun…7.8
- CVE-2025-0515The Buzz Club – Night Club, DJ and Music Festival Event Word…4.3
- CVE-2025-0516Improper Authorization in GitLab CE/EE affecting all version…4.3
- CVE-2025-0517Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2025-0518Unchecked Return Value, Out-of-bounds Read vulnerability in …5.3
- CVE-2025-0520An unrestricted file upload vulnerability in ShowDoc caused …9.4
- CVE-2025-0522The LikeBot WordPress plugin through 0.85 does not have CSR…4.7
- CVE-2025-0524Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2025-0525In affected versions of Octopus Server the preview import fe…7.5
- CVE-2025-0526In affected versions of Octopus Deploy it was possible to up…5.4
- CVE-2025-0527A vulnerability classified as critical was found in code-pro…9.8
- CVE-2025-0528A vulnerability, which was classified as critical, has been …7.2
Are you affected by CVE-2025-0521?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST