High severity · published Apr 17, 2026
CVE-2026-5231
WP Statistics <= 14.16.4 - Unauthenticated Stored Cross-Site Scripting via 'utm_source' Parameter
7.2
CVSS
0.5%
EPSS
No
On KEV
Description
The WP Statistics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'utm_source' parameter in all versions up to, and including, 14.16.4. This is due to insufficient input sanitization and output escaping. The plugin's referral parser copies the raw utm_source value into the source_name field when a wildcard channel domain matches, and the chart renderer later inserts this value into legend markup via innerHTML without escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in admin pages that will execute whenever an administrator accesses the Referrals Overview or Social Media analytics pages.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WS
WP Statistics – Simple, privacy-friendly Google Analytics alternative · veronalabs
through 14.16.4 · source: vendor
Affected product
WS
WP Statistics – Simple, privacy-friendly Google Analytics alternative
veronalabs
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5231
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5231
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/wp-statistics/tags/14.16.4/assets/dev/javascript/chart.js#L498
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/wp-statistics/tags/14.16.4/src/Service/Analytics/Referrals/ReferralsParser.php#L62
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/wp-statistics/trunk/assets/dev/javascript/chart.js#L498
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/wp-statistics/trunk/src/Service/Analytics/Referrals/ReferralsParser.php#L62
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3503795%40wp-statistics%2Ftrunk&old=3483860%40wp-statistics%2Ftrunk&sfp_email=&sfph_mail=
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/9b350b48-05ba-4054-895f-36d7ad71459d?source=cve
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