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ThemeREX Gamic EUVDEUVD-2026-112979

| CVE-2026-62016 CRITICAL
Deserialization of Untrusted Data (CWE-502)
2026-10-29 Patchstack GHSA-v35g-pjfq-8qfw
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
    Reach vulnerable theme endpoint
  2. Delivery
    Submit serialized PHP object payload
  3. Exploit
    Trigger unsafe deserialization (CWE-502)
  4. Execution
    Invoke reachable gadget chain
  5. Impact
    Compromise site (C/I/A impact)

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

Exploitation requires the target WordPress site to have the ThemeREX Gamic theme version 1.19 or earlier installed and active, and to reach the specific deserialization sink in that theme with attacker-controlled serialized input. Per the CVSS vector (PR:N/UI:N) the flaw is unauthenticated with no user interaction. A key limiting factor the sources do not resolve: full code-execution impact depends on a usable PHP property-oriented gadget chain being present and reachable in the theme, plugins, or WordPress core - the available evidence does not confirm which gadget or sink is involved. The specific parameter/endpoint that deserializes input is not described in the available sources.

Impact

Signals mostly align toward high priority. The supplied CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N, C:H/I:H/A:H, 9.8) describes a network-reachable, low-complexity, unauthenticated flaw with full confidentiality/integrity/availability impact, and the vuln.today Decision label is act_now. CWE-502 PHP Object Injection reaching unauthenticated users is a serious class because a usable gadget chain commonly escalates to code execution. However, several real-world-risk signals are absent rather than reassuring: no EPSS probability is provided, the vulnerability is not listed in CISA KEV, and no verified working exploit is referenced - the single Patchstack entry is an advisory, not exploit code. The impact ceiling (C:H/I:H/A:H) is contingent on a suitable PHP gadget chain being present in the theme or its loaded plugins/core; the available sources do not describe the trigger or confirm a reachable gadget, so the maximum impact is plausible but not demonstrated. Net: treat as a genuine act_now priority for anyone running the Gamic theme, while recognizing the high score reflects potential rather than observed mass exploitation.

Exploit ScenarioDerived

A remote, unauthenticated attacker sends a crafted request to a WordPress site running the Gamic theme (<= 1.19) containing a serialized PHP object in a parameter the theme deserializes. If a property-oriented gadget chain is reachable, deserialization triggers it, potentially leading to code execution, data disclosure, or site compromise. No public exploit identified at time of analysis; the trigger is 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 ThemeREX Gamic WordPress theme through version 1.19 lets remote attackers supply crafted serialized input to a deserialization sink, and the CVSS 9.8 vector indicates high confidentiality, integrity, and availability impact. The vulnerability class is CWE-502; full code-execution impact depends on a usable PHP gadget chain, and the specific vulnerable parameter or endpoint is not described in the available sources. The provided intelligence has no CISA KEV listing or public exploit identified at time of analysis, while the vuln.today decision label is act_now.

RemediationAI

No vendor-released fixed Gamic version is identified in the provided data, so patch status is not independently confirmed; check the Patchstack advisory for the current fixed release and apply it when published. Given the act_now decision signal, prioritize affected sites; until a vendor fix is available, deactivate and remove the vulnerable Gamic theme and migrate to a maintained alternative theme, which eliminates the theme's deserialization sink. If the theme must remain installed, reduce exposure by taking theme-dependent functionality offline or placing access restrictions in front of the site as compensating controls, recognizing that these measures do not correct the underlying CWE-502 flaw. Because the exact vulnerable endpoint is not described, targeted virtual patching cannot be specified from the available evidence. Advisory: https://patchstack.com/database/wordpress/theme/gamic/vulnerability/wordpress-gamic-theme-1-19-php-object-injection-vulnerability?_s_id=cve.

Affected VersionsENISA

Gamic n/a ≤1.19

Affected Packages

euvd gamic 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

The affected component is a WordPress theme, ThemeREX Gamic, identified by CPE cpe:2.3:a:themerex:gamic:*:*:*:*:*:*:*:* and reported for versions up to and including 1.19. CWE-502 covers deserialization of untrusted data, here described as PHP object injection: attacker-controlled serialized input reaches a PHP deserialization operation, which can instantiate objects and invoke magic methods. The CVSS:3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H confirms a network-reachable, unauthenticated attack with no user interaction and high impact, but the sources do not identify the deserialization sink, the request parameter, or the gadget chain required for code execution. Consequently, the trigger and the conditions that turn object injection into concrete code execution remain unverified in the supplied evidence.

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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

Unauthenticated, network-reachable PHP object injection with no user interaction (AV:N/AC:L/PR:N/UI:N); C/I/A set High reflecting the typical full-compromise ceiling of exploitable deserialization, though contingent on a reachable gadget chain.

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 Gamic <= 1.19 versions.

Executive ViewAI

Why It Matters

A critical vulnerability in the ThemeREX Gamic WordPress theme (through version 1.19) allows unauthenticated attackers to inject serialized data that can lead to arbitrary code execution on affected sites. Any organization hosting web properties built on this theme faces potential full compromise of confidentiality, integrity, and availability, making this a priority for leadership given how widely WordPress themes are deployed across public-facing marketing and content sites.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: disable or remove the vulnerable theme, deploy WAF rules blocking crafted serialized input, restrict and monitor theme endpoints, and accelerate migration to a maintained alternative theme.

Threat Intelligence Overview

EPSS Score
0.4%
Top 66% exploitable
Prevalence
Low
niche commercial WordPress gaming theme by ThemeREX, limited 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
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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