CVE-2026-25449

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Deserialization Object Injection in Shinetheme Traveler

Publication date: 2026-03-18

Last updated on: 2026-04-23

Assigner: Patchstack

Description

Deserialization of Untrusted Data vulnerability in shinetheme Traveler traveler allows Object Injection.This issue affects Traveler: from n/a through < 3.2.8.1.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-03-18

Last Modified

2026-04-23

Generated

2026-07-06

AI Q&A

2026-03-18

EPSS Evaluated

2026-07-05

NVD

CVE-2026-25449

EUVD

EUVD-2026-12821

Affected Vendors & Products

Vendor	Product	Version / Range
shinetheme	traveler	From 3.2.8.1 (inc) to 3.2.8.1 (exc)
shinetheme	traveler	to 3.2.8.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Compliance Impact

I don't know

Detection Guidance

I don't know

Executive Summary

CVE-2026-25449 is a high-severity PHP Object Injection vulnerability found in the WordPress Traveler Theme versions prior to 3.2.8.1.

This vulnerability allows unauthenticated attackers to inject malicious objects into the application, potentially leading to arbitrary code execution, SQL injection, path traversal, denial of service, and other attacks if a suitable PHP Object Injection Property Oriented Programming (POP) chain is present.

It is classified under the OWASP Top 10 category A3: Injection and has a critical CVSS score of 9.8.

Impact Analysis

This vulnerability can have severe impacts including allowing attackers to execute arbitrary code on your system, perform SQL injection attacks, traverse paths to access unauthorized files, and cause denial of service conditions.

Because the vulnerability can be exploited without authentication, it poses a significant risk to any website using the affected Traveler Theme versions.

Exploitation could lead to complete compromise of the affected website, data breaches, service outages, and other security incidents.

Mitigation Strategies

The immediate mitigation step is to update the WordPress Traveler Theme to version 3.2.8.1 or later, which contains the patch for this vulnerability.

If you are unable to update immediately, Patchstack provides an automatic mitigation rule to block attacks targeting this vulnerability until the update can be applied.

Users who cannot update right away are advised to seek assistance from their hosting provider or web developer to apply temporary protections.

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