What is CVE-2023-4779?

CVE-2023-4779 is a medium-severity vulnerability in Plugin-Planet User Submitted Posts, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2023-09-06.

How severe is CVE-2023-4779?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2023-4779 known to be exploited?

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

XSS in Plugin-Planet User Submitted Posts

CVE-2023-4779

The User Submitted Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's [usp_gallery] shortcode in versions up to, and including, 20230811 due to insufficient input sanitization and output escaping on user supplied attributes like 'before'. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (24.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

security@wordfence.com (Third Party Advisory)
security@wordfence.com (Third Party Advisory)

Frequently asked questions

What is CVE-2023-4779?: CVE-2023-4779 is a medium-severity vulnerability in Plugin-Planet User Submitted Posts, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2023-09-06.
How severe is CVE-2023-4779?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2023-4779 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.