Cyber Posture

CVE-2025-26873

Critical

Published: 27 March 2025

Published
27 March 2025
Modified
23 April 2026
KEV Added
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Patch
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CVSS Score 9.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.0028 51.1th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Description

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

Security Summary

CVE-2025-26873 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the shinetheme Traveler WordPress theme. This issue affects Traveler versions from n/a through those prior to 3.2.1.

The vulnerability carries a CVSS v3.1 base score of 9.0 (AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H). Unauthenticated remote attackers can exploit it over the network with high attack complexity and no user interaction. Successful exploitation enables high impacts on confidentiality, integrity, and availability across a changed scope.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/traveler/vulnerability/wordpress-traveler-theme-3-1-8-php-object-injection-vulnerability?_s_id=cve details the PHP object injection vulnerability and indicates that updating to Traveler version 3.2.1 or later mitigates the issue.

Details

CWE(s)
CWE-502

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

The PHP object injection (deserialization of untrusted data) vulnerability in a public-facing WordPress theme allows unauthenticated remote attackers to exploit the application over the network, directly mapping to T1190 Exploit Public-Facing Application.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

References