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TI-2026-83630 Aliases CVE-2026-66570GHSA-9jg4-gr2w-m5jg

Stored cross-site scripting in WordPress File Upload plugin

Priority LOW 31CWE-79Published · Updated

Key facts

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

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

Summary

Nickboss WordPress File Upload (wp-file-upload) plugin from n/a through 5.2.1 contains a stored cross-site scripting flaw. Input is not neutralized during web page generation (CWE-79), so stored script is served to other users. A remote attacker without privileges can store the script, and it runs in a victim's browser when a user interacts with the affected page.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Nickboss WordPress File Upload wp-file-upload allows Stored XSS.This issue affects WordPress File Upload: from n/a through 5.2.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00201 10th 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
nickbossWordPress File Uploadup to 5.2.1—No fix listedCNA
  • WordPress File Upload Vendornickboss Affected up to 5.2.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for WordPress File Upload.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Timeline

  1. 2026-11-01 Threatist record created from CVE-2026-66570
  2. 2026-11-01 CISA SSVC decision points changed
  3. 2026-11-01 Priority changed: MEDIUM → LOW
  4. 2026-11-01 Alias added: GHSA-9jg4-gr2w-m5jg

References

Other 1

  • TI-2024-08399 Path traversal in nickboss Iptanus File Upload CVSS 3.1CRITICAL 9.8
  • TI-2024-06166 WordPress File Upload < 4.24.8 - Reflected XSS CVSS 3.1MEDIUM 6.1
  • TI-2024-06023 WordPress File Upload < 4.24.8 - Unauthenticated Stored XSS CVSS 3.1MEDIUM 6.1
  • TI-2023-04428 WordPress File Upload < 4.23.3 - Author+ Stored Cross-Site Scripting CVSS 3.1MEDIUM 5.4
  • TI-2024-10760 Code injection in nickboss Iptanus File Upload CVSS 3.1CRITICAL 9.8
  • TI-2020-08479 An issue was discovered in the File Upload plugin before 4.13.0 for WordPress. CVSS 3.1CRITICAL 9.8
See all 27 →

Sources

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