REDAXO is a PHP-based content management system. Prior to 5.21.2, redaxo/src/addons/mediapool/pages/sync.php inserts filenames held in $diffFiles from the media filesystem into the Mediapool Sync page without rex_escape(). An attacker who can place an unregistered file with HTML metacharacters in the media directory can execute script in the browser of a backend user with media[sync] permission when that user opens the Sync page, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-79"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63002.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:redaxo:redaxo:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "5.21.2"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "5.21.2",
"range": [
{
"fixed": "31d61c6a460b6c8daf09baa75d6477fa3a93a68b"
}
],
"source": "REFERENCES_TAG"
}
]
}