Reported vulnerability

SiteSEO – SEO Simplified <= 1.2.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Broken Regex Expression

Q: Which versions of SiteSEO – SEO Simplified are affected?

Wordfence lists these affected versions: Start version unspecified, through 1.2.7. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for SiteSEO – SEO Simplified?

Wordfence reports a fix for this issue in SiteSEO – SEO Simplified. It lists these fixed versions: 1.2.8. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 26 Aug 2025

Updated 26 Aug 2025

CVE-2025-9277

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 6.4

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.

Severity vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

SiteSEO – SEO Simplified

Software: plugin · siteseo
Affected versions: Start version unspecified, through 1.2.7
Fix availability: Fix available
Fixed versions: 1.2.8

Recommended action

Update to version 1.2.8, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/b8c7cca2-94d2-4a86-bc69-d7b2b0f068ba?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of SiteSEO – SEO Simplified are affected?

Wordfence lists these affected versions: Start version unspecified, through 1.2.7. Use the version checker above to compare your installed release with this report.

Is a fix available for SiteSEO – SEO Simplified?

Wordfence reports a fix for this issue in SiteSEO – SEO Simplified. It lists these fixed versions: 1.2.8. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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