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VulnerabilityPublished Updated

CVE-2026-63002: redaxo core · Cross-site Scripting

Affects redaxo coreSource CVE Database V5

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Not known to be exploited · CVSS 4.8 Medium : upgrade to 5.21.2 when convenient.

Data as of 6 Nov 2026, 23:24 UTC

CVSS 3.1 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.21.2
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade core and redaxo/core to 5.21.2.

Affected software

ProductAffectedFixed in
redaxocoreAffected
  • <5.21.2
Fixed in
  • 5.21.2
GitHubredaxo/corepkg:github/redaxo/coreOther threatsAffected
  • <5.21.2
Fixed in
  • 5.21.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade REDAXO core to version 5.21.2 or later, where this vulnerability is fixed. No other mitigation is indicated or required by the vendor advisory.

Description

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.

References

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