Filmax WordPress theme: PHP Object Injection vulnerability
Summary
The Filmax WordPress theme up to and including version 1.1.11 contains a PHP Object Injection vulnerability (CWE-502) that can be exploited without authentication. An remote attacker can send crafted input to manipulate how the site processes serialized data, which may lead to harmful actions on the server. Whether this allows code execution depends on whether a usable gadget chain exists in the installed WordPress environment.
Affected
- Filmax WordPress theme, versions up to and including 1.1.11
- Required privilege: none (unauthenticated)
- CVSS 3.1: 9.8 (CRITICAL) according to the CNA; VulDB rates it 7.3
Fixed in
Unknown. No fixed version or vendor advisory was found as of the research date.
Workaround
- Patchstack reports a mitigation rule that blocks attacks until an official patch is available; this requires a Patchstack subscription.
- Restrict access to affected sites where possible and add WAF protection.
- Consider temporarily disabling or replacing the theme; a theme replacement is the only fully effective step while no patch exists.
Exploitation
- No public proof of concept or confirmed in-the-wild exploitation was found.
- VulDB states that no exploit exists.
- Not listed in CISA KEV; no EPSS score published yet.
- Patchstack states that exploitation is expected and that similar flaws are used in mass-exploit campaigns.
Our recommendation
- Inventory all WordPress sites for the Filmax theme and its version.
- Where version 1.1.11 or earlier is installed, plan a replacement theme as no fix is available.
- Until then, restrict access, enable WAF or virtual patching, and monitor logs for suspicious requests.
- Re-check the vendor and Patchstack pages regularly for a fixed release.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory: WordPress Filmax theme <= 1.1.11 PHP Object Injection patchstack.com
- ThemeForest listing: Filmax (ThemeREX) themeforest.net
- VulDB entry 428547 vuldb.com
- Vulners: CVE-2026-62009 vulners.com
- Vulners: Patchstack entry PATCHSTACK:1FAD8F7A294D64892DD2278A0C806DF4 vulners.com
- CVE Threat Intelligence: CVE-2026-62009 cve.threatint.com
- Strix: CVE-2026-62009 www.strix.ai
- GitHub triage entry CVE-2026-62009 github.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 15:56.
Original description (NVD)
Unauthenticated PHP Object Injection in Filmax <= 1.1.11 versions.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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