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TI-2023-04406 Aliases CVE-2023-4779GHSA-3c82-f6j3-5x2g

Cross-site scripting in specialk User Submitted Posts – Enable Users to Submit Posts from…

Priority LOW 29CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00384 32nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
specialkUser Submitted Posts – Enable Users to Submit Posts from the Front Endup to 20230811—No fix listedCNA
  • User Submitted Posts – Enable Users to Submit Posts from the Front End Vendorspecialk Affected up to 20230811 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:plugin-planet:user_submitted_posts:*:*:*:*:*:wordpress:*:*up to 20230811Vulnerablespecialk
  • cpe:2.3:a:plugin-planet:user_submitted_posts:*:*:*:*:*:wordpress:*:* Versions up to 20230811 Vulnerable ·specialk

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-4779
  2. 2026-10-03 Alias added: GHSA-3c82-f6j3-5x2g

References

Advisory 2

  • TI-2024-04645 User Submitted Posts < 20240516 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
  • TI-2019-15241 User Submitted Posts <= 20190312 - Unauthenticated Arbitrary File Upload CVSS 3.1CRITICAL 9.8
  • TI-2023-24406 WordPress User Submitted Posts Plugin <= 20230902 is vulnerable to Arbitrary File Upload CVSS 3.1CRITICAL 9.8
  • TI-2023-03982 User Submitted Posts <= 20230809 - Unauthenticated Stored Cross-Site Scripting via 'user-submitted-content' CVSS 3.1HIGH 7.2
  • TI-2016-09039 The user-submitted-posts plugin before 20160215 for WordPress has XSS via the user-submitted-content field. CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences