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CVE-2026-19988— Alaev SEO Tools Extension Popup UI popup.html addDiv cross site scripting

Quick assessment

Affected
Alaev SEO Tools Extension
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.

Алаев Alaev SEO Tools: Free Audit & Analysis是俄罗斯Алаев公司的一款SEO工具浏览器扩展。 Алаев Alaev SEO Tools: Free Audit & Analysis 1.0.10及之前版本存在安全漏洞，该漏洞源于Popup UI组件src/popup.html文件中addDiv函数对输入处理不当，容易受到跨站脚本攻击，攻击者可远程发起。

CVSS 4.3 · Medium EPSS 0.26% · P18

Affected Version Matrix 11

VendorProduct Version RangeStatus
Alaev SEO Tools Extension 1.0.0 affected
1.0.1 affected
1.0.2 affected
1.0.3 affected
1.0.4 affected
1.0.5 affected
1.0.6 affected
1.0.7 affected
… +3 more rows
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I. Basic Information for CVE-2026-19988

Vulnerability Information
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Vulnerability Title
Alaev SEO Tools Extension Popup UI popup.html addDiv cross site scripting
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was detected in Alaev SEO Tools Extension up to 1.0.10 on Chrome. This impacts the function addDiv of the file src/popup.html of the component Popup UI. Performing a manipulation results in basic cross site scripting. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Алаев Alaev SEO Tools: Free Audit & Analysis 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Алаев Alaev SEO Tools: Free Audit & Analysis是俄罗斯Алаев公司的一款SEO工具浏览器扩展。 Алаев Alaev SEO Tools: Free Audit & Analysis 1.0.10及之前版本存在安全漏洞，该漏洞源于Popup UI组件src/popup.html文件中addDiv函数对输入处理不当，容易受到跨站脚本攻击，攻击者可远程发起。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Alaev SEO Tools Extension 1.0.0 cpe:2.3:a:alaev:seo_tools_extension:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-19988

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III. Intelligence Information for CVE-2026-19988

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Proof of Concept for CVE-2026-19988 (1)

IV. Related Vulnerabilities

Same weakness: CWE-80

V. Comments for CVE-2026-19988

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