Skip to main content

Buisson CVE-2026-27084

| EUVD-2026-15796 CRITICAL
Deserialization of Untrusted Data (CWE-502)
2026-03-25 Patchstack GHSA-qq9h-65hg-3824
Deserialization Buisson
9.8
CVSS 3.1 · NVD
Share

Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Re-analysis Queued
Apr 24, 2026 - 16:37 vuln.today
cvss_changed
EUVD ID Assigned
Mar 25, 2026 - 16:47 euvd
EUVD-2026-15796
Analysis Generated
Mar 25, 2026 - 16:47 vuln.today
CVE Published
Mar 25, 2026 - 16:14 nvd
CRITICAL 9.8

DescriptionCVE.org

Deserialization of Untrusted Data vulnerability in ThemeREX Buisson buisson allows Object Injection.This issue affects Buisson: from n/a through <= 1.1.11.

AnalysisAI

A PHP Object Injection vulnerability exists in the ThemeREX Buisson WordPress theme through version 1.1.11, stemming from unsafe deserialization of untrusted data (CWE-502). This flaw allows attackers to inject malicious serialized objects that can lead to arbitrary code execution or other object manipulation attacks depending on available gadget chains in the WordPress environment. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send malicious serialized PHP object
Exploit
Trigger unsafe unserialize() call
Execution
Instantiate arbitrary gadget chain
Impact
Execute remote code with server privileges
Sign in to reveal

Vulnerability AssessmentAI

Exploitation Remote unauthenticated attacker can exploit default ThemeREX Buisson installations version <= 1.1.11. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The risk assessment is complicated by missing CVSS and EPSS metrics in the provided data. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malicious HTTP request containing a serialized PHP object targeting a vulnerable endpoint in the Buisson theme that calls unserialize() on user input. If WordPress plugins like Popular Plugins contain suitable gadget chains (e.g., __destruct methods that trigger file operations or function calls), the attacker can chain object instantiation to achieve Remote Code Execution. …
Remediation Users of the ThemeREX Buisson theme should upgrade to the latest patched version immediately (version 1.1.12 or later, once released by the vendor). … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Identify all affected systems and apply vendor patches immediately. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

Share

CVE-2026-27084 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy