StatCounter <= 2.1.1 - Authenticated (Author+) Stored Cross-Site Scripting via Author Nickname
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | StatCounter – Real Time Visitor Stats, Session Replay & Heatmaps | <= 2.1.1 | 2.1.2 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- WordPress
- Package
StatCounter – Real Time Visitor Stats, Session Replay & Heatmaps- Disclosed
- 28.05.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 30e0bf40-7f7b-43e6-8439-6dc00a889344 - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: StatCounter – Real Time Visitor Stats, Session Replay & Heatmaps
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 01.2022 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 4
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 3
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StatCounter <= 2.1.1 - Authenticated (Author+) Stored Cross-Site Scripting via Author Nickname this entry
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