CVE-2025-26873 CRITICAL

CVE-2025-26873: WordPress Traveler theme <= 3.1.8 - PHP Object Injection vulnerability

Vendor Shinetheme

Product Traveler

Weakness CWE-502 · Unsafe deserialization

Published March 27, 2025

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

9.0/10

Attack vector Network

Attack complexity High

Privileges required None

User interaction None

Confidentiality High

Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

Deserialization of Untrusted Data vulnerability in shinetheme Traveler traveler.This issue affects Traveler: from n/a through < 3.2.1.

Explanation of Vulnerability in Simple Terms

02Summary

Traveler versions up to 3.2.1 contain a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code on the server. The vulnerability requires specific network conditions but can compromise confidentiality, integrity, and availability of the entire site. Administrators should update to a version newer than 3.2.1 immediately.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the server without authentication, potentially compromising the entire site.

Potential impact on your site

04Site Impact

Complete site compromise possible: attackers can read data, modify content, disable the site, or use it to attack other systems.

Conditions required to exploit

05Prerequisites

Network access to the vulnerable Traveler installation; no authentication or user interaction required.

Key dates

06Disclosure timeline

March 27, 2025 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-26873 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html

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