What’s Vulnerable › Vulnerabilities

CVE-2023-4308: User Submitted Posts <= 20230809 - Unauthenticated Stored Cross-Site Scripting via 'user-submitted-content'

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-15 · updated 2026-06-17
• Weakness: CWE-79

Description

The User Submitted Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘user-submitted-content’ parameter in versions up to, and including, 20230809 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.

Affected products

• specialk User Submitted Posts – Enable Users to Submit Posts from the Front End: before 20230811 — fixed in 20230811

How to fix

Upgrade to a fixed version: specialk User Submitted Posts – Enable Users to Submit Posts from the Front End 20230811. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/changeset/2952471/user-submitted-posts
• https://www.wordfence.com/threat-intel/vulnerabilities/id/3bb4d37c-c4c2-4523-9b4e-73ffb7be81ea?source=cve
• https://plugins.trac.wordpress.org/changeset/2952471/user-submitted-posts
• https://www.wordfence.com/threat-intel/vulnerabilities/id/3bb4d37c-c4c2-4523-9b4e-73ffb7be81ea?source=cve

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