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CVE-2026-52763— YesWiki: SQL injection via the `recentchanges` action `period` argument leading to arbitrary DB read

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， 动作（ ）接受来自两个互不重叠的参数空间的 参数。白名单仅对 URL 形式的参数进行校验，允许值为 。而对于动作参数形式（即通过表单或动作调用传入的 ），代码走的是 分支，未做任何校验。该参数值直接传入 ，并被直接插值拼接到 SQL 语句的 子句中，既没有转义也没有使用参数化查询。 攻击者可通过基于 的注入成功读取数据库行，泄露的数据会渲染在响应页面中，因此任何访问触发页面的用户都能看到外泄的数据。该漏洞使得任何能够保存触发页面的用户（包

CVSS 6.5 · Medium EPSS 0.04% · P14

Possible ATT&CK Techniques 1 AI

T1003 · OS Credential Dumping
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I. Basic Information for CVE-2026-52763

Vulnerability Information
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Vulnerability Title
YesWiki: SQL injection via the `recentchanges` action `period` argument leading to arbitrary DB read
Source: CVE Program / CVE List V5
Vulnerability Description
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, the recentchanges action (actions/recentchanges.php) accepts a period argument from two disjoint parameter spaces. A whitelist validates only the URL form against ['day','week','month']. The action-argument form takes the else branch with no validation, and the value flows into PageManager::getRecentlyChanged(), where it is interpolated into a WHERE time >= '...' ORDER BY time DESC clause without escaping or parameterization. UNION-based injection succeeds, the leaked rows render into the response page, so any visitor of the trigger page sees the exfiltrated data. The vulnerability provides arbitrary read of the YesWiki database to anyone who can save the trigger page. On a default install (default_write_acl='*'), this includes anonymous users, subject to the hashcash JS check on the page-edit form. Once the trigger page is saved, every subsequent view fires the injection as the SQLi is stored. Stored SQL injection is reachable through the page-edit flow, with arbitrary database read. This issue has been patched in version 4.6.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
YesWiki yeswiki < 4.6.6 -

II. Public POCs for CVE-2026-52763

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III. Intelligence Information for CVE-2026-52763

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Vendor Advisories for CVE-2026-52763 (1)

Other References for CVE-2026-52763 (1)

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

CVE-2026-52777 9.4 CRITICAL YesWiki: Authenticated PHP Object Injection in BazarImportAction via unserialize
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-2026-52773 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-89

V. Comments for CVE-2026-52763

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