CVE-2026-7634 | SlimStat Analytics <= 5.4.11 - Unauthenticated Stored Cross-Site Scripting via User-Agent Header

The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'User-Agent' header in all versions up to, and including, 5.4.11 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. The show_complete_user_agent_tooltip setting must be explicitly enabled by an administrator (disabled by default) for the stored payload to be rendered and executed.

Published: 2026-05-28 Last update: 2026-05-28 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2026-7634 is rated Moderate Risk (41.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.16%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-7634

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-03 0.12% 0.16% +0.04%
2 2026-05-28 0.12%

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-7634

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
3.9 2.7 [email protected]

Weakness enumeration for CVE-2026-7634

GitHub Security Advisory for CVE-2026-7634

GHSA-xvg3-935w-4mv9 · Severity: high — The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ...

Affected software / configurations for CVE-2026-7634

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-7634

URL Tags
https://github.com/wp-slimstat/wp-slimstat/pull/297
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.11/admin/view/wp-slimstat-reports.php#L2099
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.11/src/Services/Browscap.php#L270
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.11/src/Tracker/Processor.php#L776
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.11/src/Tracker/Storage.php#L25
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.4/admin/view/wp-slimstat-reports.php#L2099
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.4/src/Services/Browscap.php#L270
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.4/src/Tracker/Processor.php#L776
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.4/src/Tracker/Storage.php#L25
https://plugins.trac.wordpress.org/browser/wp-slimstat/trunk/admin/view/wp-slimstat-reports.php#L2099
https://plugins.trac.wordpress.org/browser/wp-slimstat/trunk/src/Services/Browscap.php#L270
https://plugins.trac.wordpress.org/browser/wp-slimstat/trunk/src/Tracker/Processor.php#L776
https://plugins.trac.wordpress.org/browser/wp-slimstat/trunk/src/Tracker/Storage.php#L25
https://www.wordfence.com/threat-intel/vulnerabilities/id/0a309bf8-7fe3-4033-993c-3c8dba0f216d?source=cve
cvelogic Threat Intelligence