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CVE-2026-97641— Relevanssi <= 4.28.3 - Unauthenticated Stored Cross-Site Scripting via Comment Content

Quick assessment

Affected
comesio Relevanssi – A Better Search
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.

WordPress 插件 Relevanssi – A Better Search 在所有 4.28.3 及更早版本中存在存储型跨站脚本（Stored XSS）漏洞，该漏洞由评论输入内容引发，原因是输入清理和输出转义机制不足。这使得未经身份验证的攻击者能够在页面中注入任意 Web 脚本，当用户访问被注入脚本的页面时，这些脚本将自动执行。 该漏洞仅在管理员将“摘要中允许的标签”（Allowable tags in excerpts）配置为非空值（例如默认示例值 ）时才可被利用，因为用于前缀匹配的regex必须要求存在

CVSS 7.2 · High EPSS 0.24% · P14

Affected Version Matrix 1

VendorProduct Version RangeStatus
comesio Relevanssi – A Better Search ≤ 4.28.3 affected
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I. Basic Information for CVE-2026-97641

Vulnerability Information
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Vulnerability Title
Relevanssi <= 4.28.3 - Unauthenticated Stored Cross-Site Scripting via Comment Content
Source: CVE Program / CVE List V5
Vulnerability Description
The Relevanssi – A Better Search plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content in all versions up to, and including, 4.28.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is only exploitable when the administrator has configured a non-empty value for the "Allowable tags in excerpts" setting, such as the default example value of &lt;p&gt;&lt;a&gt;&lt;strong&gt;, as the prefix-matching regex must have an allowable tag whose name is a prefix of the injected tag name.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
comesio Relevanssi – A Better Search 0 ~ 4.28.3 -

II. Public POCs for CVE-2026-97641

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III. Intelligence Information for CVE-2026-97641

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Patches & Fixes for CVE-2026-97641 (2)

Vendor Advisories for CVE-2026-97641 (1)

IV. Related Vulnerabilities

Same product: Relevanssi – A Better Search
Same vendor: comesio
Same weakness: CWE-79

V. Comments for CVE-2026-97641

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