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CVE-2026-6275— StatCounter <= 2.1.1 - Authenticated (Author+) Stored Cross-Site Scripting via Author Nickname

CVSS 6.4 · Medium EPSS 0.04% · P11

Possible ATT&CK Techniques 1AI

T1059.001 · PowerShell

Affected Version Matrix 1

VendorProductVersion RangeStatus
statcounterStatCounter – Free Real Time Visitor Stats≤ 2.1.1affected
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I. Basic Information for CVE-2026-6275

Vulnerability Information
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Vulnerability Title
StatCounter <= 2.1.1 - Authenticated (Author+) Stored Cross-Site Scripting via Author Nickname
Source: NVD (National Vulnerability Database)
Vulnerability Description
The StatCounter – Free Real Time Visitor Stats plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.1.1 This is due to insufficient output escaping on the post author's nickname in the statcounter_addToTags() function. The function is hooked to wp_head and fires on every single post page. It retrieves the post author's nickname via the_author_meta() and echoes it directly into a JavaScript double-quoted string context inside a <script> block without applying esc_js() or any equivalent JavaScript-context escaping. This makes it possible for authenticated attackers with Author-level access and above to inject arbitrary web scripts into pages that will execute whenever any user (including unauthenticated visitors) accesses a post authored by the attacker.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
statcounterStatCounter – Free Real Time Visitor Stats 0 ~ 2.1.1 -

II. Public POCs for CVE-2026-6275

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III. Intelligence Information for CVE-2026-6275

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Patches & Fixes for CVE-2026-6275 (3)

Vendor Pages for CVE-2026-6275 (1)

Other References for CVE-2026-6275 (1)

IV. Related Vulnerabilities

Same product: StatCounter – Free Real Time Visitor Stats
Same vendor: statcounter
Same weakness: CWE-79

V. Comments for CVE-2026-6275

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