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A cross-site scripting (XSS) vulnerability exists in PostNuke 0.761 and earlier due to an interpretation conflict involving HTML tags with a trailing '<' character. This character is interpreted as a '>' by some web browsers, allowing attackers to bypass blacklist-based input validation in the pnVarCleanFromInput function (pnAPI.php), pnSecureInput function (pnAntiCracker.php), and the htmltext parameter in user.php's edituser operation.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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No public activity observed for this vulnerability.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
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