CVE-2026-116823— YesWiki before 4.7.0 Reflected XSS via BazarField $_REQUEST Fallback

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 在 4.7.0 版本之前存在一个反射型跨站脚本（XSS）漏洞。未认证的攻击者可以通过提供与缺失的 Bazar 字段名称相匹配的查询参数，注入 JavaScript 代码。攻击者可构造恶意链接，利用 BazarField::getValue() 方法在找不到对应字段时回退到未过滤的 $_REQUEST 值，并通过 Twig 的

CVSS 6.1 · Medium Updated Oct 27, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

YesWiki before 4.7.0 Reflected XSS via BazarField $_REQUEST Fallback

Source: CVE Program / CVE List V5

Vulnerability Description

YesWiki before 4.7.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject JavaScript by supplying query parameters matching missing Bazar field names. Attackers can craft links where BazarField::getValue() falls back to unsanitized $_REQUEST values rendered via Twig |raw templates, performing same-origin authenticated actions in victims' sessions.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
YesWiki	yeswiki	0 ~ 4.7.0	-

II. Public POCs for CVE-2026-116823

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-116823

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Other References for CVE-2026-116823 (2)

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-hcvp-q8fx-84mc vendor-advisory
https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-reflected-xss-via-bazarfield-request-fallback third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-116823

Same Patch Batch · YesWiki · 2026-10-26 · 9 CVEs total

CVE-2026-116827	6.8 MEDIUM	YesWiki before 4.7.0 SSRF via copyUrlToLocalFile in Bazar CSV Import
CVE-2026-116826	6.8 MEDIUM	YesWiki before 4.7.0 Authenticated SSRF via Page Duplication API downloadFile
CVE-2026-116821	6.5 MEDIUM	YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in Usernames
CVE-2026-116825	6.5 MEDIUM	YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox
CVE-2026-116824	6.1 MEDIUM	YesWiki before 4.7.0 Stored XSS via Referer Header in referrers_sites Handler
CVE-2026-116822	5.3 MEDIUM	YesWiki before 4.7.0 Template Traversal via BazarListeAction template Parameter
CVE-2026-116820	5.3 MEDIUM	YesWiki from 4.6.0 before 4.7.0 SQL Query Disclosure via showreq Parameter
CVE-2026-116828	4.9 MEDIUM	YesWiki before 4.7.0 SQL Injection via despam.php INTERVAL operand

IV. Related Vulnerabilities

Same product: yeswiki

Same vendor: YesWiki

Same weakness: CWE-79