CVE-2026-57366 — WPAdverts
HIGHCVE-2026-57366 is a high-severity (CVSS 7.1) Cross-site Scripting (XSS) vulnerability in Greg Winiarski WPAdverts. Versions up to 2.3.1 are affected; the records list no fixed version yet, so check the vendor advisory below.
Unauthenticated Cross Site Scripting (XSS) in WPAdverts <= 2.3.1 versions.
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-57366.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Description
Unauthenticated Cross Site Scripting (XSS) in WPAdverts <= 2.3.1 versions.
Affected Products
WPAdvertsGreg WiniarskiDetection & mitigation playbook
Vendor / applianceDetect
Inventory every Greg Winiarski WPAdverts deployment and check each version against the affected-products list above.
Remediation status
The records we use list no fixed version for CVE-2026-57366 (versions up to 2.3.1 are affected). Check the Greg Winiarski WPAdverts advisory for a patched release, and apply the workarounds below until you can upgrade.
Mitigate without a patch
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-57366 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.