Medium severity · published Aug 26, 2025
CVE-2025-9277
SiteSEO – SEO Simplified <= 1.2.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Broken Regex Expression
6.4
CVSS
0.2%
EPSS
No
On KEV
Description
The SiteSEO – SEO Simplified plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the broken preg_replace expression in all versions up to, and including, 1.2.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SS
SiteSEO – SEO Simplified · softaculous
through 1.2.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9277
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9277
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/siteseo/tags/1.2.6/main/advanced.php#L80
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/b8c7cca2-94d2-4a86-bc69-d7b2b0f068ba?source=cve
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