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CVE-2026-52777— YesWiki: Authenticated PHP Object Injection in BazarImportAction via unserialize

Quick assessment

Affected
YesWiki yeswiki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

YesWiki 是一个用 PHP 编写的维基系统。在 4.6.6 版本之前，BazarImportAction 中存在一个已认证的 PHP 对象注入漏洞，攻击者可通过 函数触发。该问题已在 4.6.6 版本中修复。

CVSS 9.4 · Critical EPSS 0.38% · P60

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-52777

Vulnerability Information
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Vulnerability Title
YesWiki: Authenticated PHP Object Injection in BazarImportAction via unserialize
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
YesWiki yeswiki < 4.6.6 -

II. Public POCs for CVE-2026-52777

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III. Intelligence Information for CVE-2026-52777

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Patches & Fixes for CVE-2026-52777 (1)

Vendor Advisories for CVE-2026-52777 (1)

Other References for CVE-2026-52777 (1)

Same Patch Batch · YesWiki · 2026-09-04 · 12 CVEs total

CVE-2026-52766 9.1 CRITICAL YesWiki: Unauthenticated arbitrary page deletion via `{{erasespamedcomments}}` action
CVE-2026-52775 8.8 HIGH YesWiki Authenticated SQL Injection in ReactionManager
CVE-2026-52769 8.3 HIGH YesWiki: Unauthenticated Server-Side Request Forgery via ActivityPub `Signature.keyId`
CVE-2026-52771 8.3 HIGH YesWiki: Second-Order SQL Injection in Page Delete API via Unescaped Page Tag (`ApiControl
CVE-2026-52767 8.2 HIGH YesWiki: Unauthenticated ActivityPub Signature-Verification Bypass via `!openssl_verify(..
CVE-2026-52770 7.5 HIGH Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') in ye
CVE-2026-52762 7.1 HIGH YesWiki: Authenticated (Admin) Server-Side Template Injection to Remote Code Execution via
CVE-2026-52763 6.5 MEDIUM YesWiki: SQL injection via the `recentchanges` action `period` argument leading to arbitra
CVE-2026-52773 6.1 MEDIUM Reflected XSS via Unescaped Archived-Revision `time` Parameter in `handlers/page/show.php`
CVE-2026-52774 6.1 MEDIUM Reflected XSS via Unescaped `id` Parameter in Bazar Widget HTML Attributes in YesWiki
CVE-2026-52772 5.5 MEDIUM YesWiki: Bazar form-field templates still apply `|raw('html')` to `field.label` / `field.h

IV. Related Vulnerabilities

Same product: yeswiki
Same vendor: YesWiki
Same weakness: CWE-352

V. Comments for CVE-2026-52777

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