Cross Site Scripting Vulnerability in Alaev SEO Tools Extension for Chrome
CVE-2026-19988

5.3MEDIUM

Key Information:

Vendor

Alaev

Status
Seo Tools Extension
Vendor
CVE Published:
17 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19988?

Alaev SEO Tools Extension for Chrome versions up to 1.0.10 has a vulnerability in its Popup UI component, specifically in the addDiv function within src/popup.html. This vulnerability allows remote attackers to execute scripts in the context of the user’s browser, leading to potential unauthorized access to sensitive data. The exploit relies on unsanitized user input, enabling basic cross site scripting (XSS) attacks. This disclosure has been publicly acknowledged, but the vendor has not responded to notifications regarding the vulnerability.

Affected Version(s)

SEO Tools Extension 1.0.0

SEO Tools Extension 1.0.1

SEO Tools Extension 1.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-19988 - Proof of Concept

References

https://vuldb.com/vuln/391192
vdb-entrytechnical-description
https://vuldb.com/vuln/391192/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19988
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

DRXYJ (VulDB User)
VulDB CNA Team
.