CVE-2026-52777
Received Received - Intake

Authenticated PHP Object Injection in YesWiki via BazarImportAction

Publication date: 2026-09-05

Last updated on: 2026-09-05

Assigner: GitHub, Inc.

Description
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, there is an authenticated PHP object injection vulnerability in BazarImportAction via unserialize. This issue has been patched in version 4.6.6.

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Meta Information

Published
2026-09-05
Last Modified
2026-09-05
Generated
2026-09-05
AI Q&A
2026-09-05
EPSS Evaluated
N/A
NVD
CVE-2026-52777

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
yeswiki yeswiki to 4.6.6 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-352 The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

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Executive Summary

This is an authenticated PHP object injection vulnerability in YesWiki versions prior to 4.6.6. It occurs in the BazarImportAction component due to unsafe use of the unserialize function, which can allow an attacker to inject malicious PHP objects.

Detection Guidance

Detection requires checking the YesWiki version. If you are running a version prior to 4.6.6, the system is vulnerable. No specific commands are provided in the context to detect PHP object injection directly.

Impact Analysis

An attacker with authenticated access could exploit this to execute arbitrary code on the server, potentially leading to full system compromise, data theft, or further network infiltration.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's integrity and confidentiality principles and HIPAA's security requirements for protected health information.

Mitigation Strategies

Upgrade YesWiki to version 4.6.6 or later immediately to patch the vulnerability. Remove or disable the BazarImportAction if it is not required.

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