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Filmax WordPress Theme CVE-2026-62009

| EUVDEUVD-2026-112972 CRITICAL
Deserialization of Untrusted Data (CWE-502)
2026-10-29 Patchstack GHSA-frfr-h547-gfrm
9.8
CVSS 3.1 · Vendor: Patchstack
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Identify site running vulnerable Filmax theme
  2. Delivery
    Send request with crafted serialized PHP object
  3. Exploit
    Theme deserializes attacker input (object injection)
  4. Execution
    Trigger POP gadget chain
  5. Impact
    Compromise site data or server

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A08:2025 - Software or Data Integrity Failures
ASVS 5.0
V1 - Encoding and Sanitization Safe deserialization, type allowlists
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Per the CVSS vector (AV:N/AC:L/PR:N/UI:N) the flaw is remotely reachable without authentication or user interaction against a site running the Filmax WordPress theme version 1.1.11 or earlier. The principal limiting factor is inherent to PHP Object Injection: meaningful impact typically requires a reachable POP gadget chain in the theme, active plugins, or WordPress core, and the available sources do not describe the injection vector or confirm a usable gadget chain - so the trigger is not described in the available sources. Exploitation is further bounded to installations actually running the affected theme at <= 1.1.11.

Impact

The input CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, 9.8 Critical) describes a remotely reachable, low-complexity, unauthenticated flaw with full confidentiality, integrity, and availability impact, and the vuln.today priority is act_now. However, the exploitation signals that normally corroborate a 9.8 are largely absent: no EPSS probability is provided, the CVE is not listed in CISA KEV, and no public exploit or PoC reference is present in the data - only the Patchstack advisory itself. So the severity rating is high but the real-world exploitation evidence is thin and unconfirmed. Importantly, this is a PHP Object Injection (CWE-502) flaw, and the practical impact of such flaws usually depends on an exploitable POP gadget chain being reachable in the theme or its loaded plugins/WordPress core; the available sources do not describe the trigger or any confirmed gadget chain, so whether the full C:H/I:H/A:H impact is actually achievable in a default install is not verified here. Net: treat as a high-priority patching candidate given the act_now label and unauthenticated network vector, but note the gap between the maximal CVSS impact claim and the absence of EPSS/KEV/PoC evidence - this reads as a theoretically critical bug without confirmed active exploitation rather than a demonstrated mass-exploited threat.

Exploit ScenarioDerived

A remote attacker sends a crafted request to a WordPress site running the Filmax theme (version 1.1.11 or earlier) containing a serialized PHP object in an attacker-controlled parameter, which the theme deserializes without authentication. If a usable POP gadget chain is present in the loaded code, this can lead to actions such as file operations, code execution, or data compromise. No public exploit code is identified in the provided data, and the exact injection point and required gadget chain are not described in the available sources.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 29, 2026

Unauthenticated PHP Object Injection in the Filmax WordPress theme through version 1.1.11 lets remote attackers reach deserialization logic without credentials or user interaction, carrying a 9.8 Critical CVSS score and an act_now priority from vuln.today. Impact is full confidentiality, integrity and availability loss per the assessed vector, although real-world damage depends on a usable POP gadget chain being reachable through the theme, an active plugin, or WordPress core; the available sources do not describe the injection vector or confirm such a chain, so the trigger is not described in the available sources. No public exploit code or active exploitation is confirmed at time of analysis, and the only supplied reference is Patchstack's vulnerability entry for the theme.

RemediationAI

Update the Filmax theme to a version later than 1.1.11; the supplied sources do not state an exact fixed version number, so confirm the corrected release in the Patchstack advisory at https://patchstack.com/database/wordpress/theme/filmax/vulnerability/wordpress-filmax-theme-1-1-11-php-object-injection-vulnerability?_s_id=cve before upgrading. Because the flaw is unauthenticated and remotely reachable per the assessed CVSS vector, treat the theme update as the primary and complete fix, and if an immediate upgrade is not possible, deactivate and remove the Filmax theme from any internet-facing site until a patched release is confirmed - an action that will change the site's appearance and layout. Reducing exposure further means trimming unused plugins and themes, since PHP Object Injection impact depends on gadget chains present in loaded code.

Affected VersionsENISA

Filmax n/a ≤1.1.11

Affected Packages

euvd filmax no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-502 (Deserialization of Untrusted Data) in a PHP/WordPress theme context means attacker-influenced input reaches an unserialize() call, allowing crafted serialized objects to be instantiated. The CPE cpe:2.3:a:themerex:filmax identifies the ThemeREX Filmax theme as the affected component, with the wildcard version range covering everything up to and including 1.1.11. The CVSS:3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H confirms network reachability, low attack complexity, no privileges and no user interaction required, with scope unchanged and high impact on all three pillars. PHP Object Injection is only as dangerous as the magic methods (__wakeup, __destruct, __toString) available in loaded code: exploitation generally needs a gadget chain in the theme, an installed plugin, or core, and the provided intelligence neither identifies the vulnerable parameter nor confirms that a usable chain exists, so the concrete exploitation path remains unverified.

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Severity by source

Vendor (Patchstack) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 9.8 CRITICAL

Advisory states unauthenticated object injection reachable over the network with low complexity (AV:N/AC:L/PR:N/UI:N); object injection to code/data compromise supports C:H/I:H/A:H.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Unauthenticated PHP Object Injection in Filmax <= 1.1.11 versions.

Executive ViewAI

Why It Matters

CVE-2026-62009 is a critical unauthenticated PHP Object Injection vulnerability in the Filmax WordPress theme (versions ≤1.1.11) that could allow remote attackers to fully compromise website confidentiality, integrity, and availability. Any organization hosting a WordPress site with this theme is at risk, and although no public exploit code exists yet, the potential for full site takeover warrants immediate leadership attention.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations include disabling or removing the Filmax theme, restricting access to vulnerable endpoints via WAF rules, and monitoring for suspicious activity.

Threat Intelligence Overview

EPSS Score
0.4%
Top 63% exploitable
Prevalence
Low
niche commercial WordPress film/cinema theme, limited production footprint
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
Very High
Technical Impact
Total

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Insecure deserialization occurs when an application converts serialized data (a stream of bytes representing an object's state) back into a living object without proper validation.

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