TI-2026-70431 Aliases CVE-2026-66565 GHSA-gpxw-g22x-43pr

PHP object injection in WordPress FC United theme

MEDIUM 49CWE-502Published 2026-10-10 · Updated 2026-10-11

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

The axiomthemes FC United theme for WordPress, through version 1.1.1, is affected. The flaw is deserialization of untrusted data (CWE-502), which lets crafted input be turned into PHP objects. An unauthenticated remote attacker can use it to affect the confidentiality, integrity and availability of the site.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Unauthenticated PHP Object Injection in FC United <= 1.1.1 versions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00304 23rd 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: Yes
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
axiomthemes	FC United	up to 1.1.1	—	No fix listed	CNA

FC United Vendoraxiomthemes Affected up to 1.1.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for FC United.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-11 Threatist record created from CVE-2026-66565
2026-10-11 Alias added: GHSA-gpxw-g22x-43pr

References

Other 1

https://patchstack.com/database/wordpress/theme/fcunited/vulnerability/wordpress-fc-united-theme-1-1-1-php-object-injection-vulnerability?_s_id=cve

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Sources

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