CVE-2026-63001: REDAXO is a PHP-based content management system

Q: How do I fix CVE-2026-63001?

redaxo: upgrade to 5.21.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-63001 being exploited?

CVE-2026-63001 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-63001 affect?

CVE-2026-63001 affects redaxo. Severity is medium (CVSS 4.8). REDAXO is a PHP-based content management system. Prior to 5.21.2, the mediaIsInUse() handler in redaxo/src/addons/media_manager/lib/media_manager.php inserts a Media Manager type name into raw backend warning HTML without escaping it when i

Q: How urgent is CVE-2026-63001?

Priority 24/100. Public exploit reference

Routine

MEDIUM 4.8UPGRADE

CVE-2026-63001 is a medium-severity flaw (CVSS 4.8) affecting redaxo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

REDAXO is a PHP-based content management system. Prior to 5.21.2, the mediaIsInUse() handler in redaxo/src/addons/media_manager/lib/media_manager.php inserts a Media Manager type name into raw backend warning HTML without escaping it when invoked through MEDIA_IS_IN_USE. An administrator with Media Manager access can store HTML in a type name, and the payload executes in another administrator's browser when that administrator tries to delete medi

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-09-23
Last modified	2026-10-19

Publisher (CNA): GitHub, Inc. · Vendor: redaxo

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-23 15:17 UTCPublished CVE record published
2026-10-19 20:35 UTCUpdated Record last modified

redaxo redaxo UPGRADE

Affected: < 5.21.2

Fixed in: 5.21.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy redaxo || rpm -q redaxo || redaxo --version

2. UPGRADE to 5.21.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade redaxo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade redaxo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-63001?

redaxo: upgrade to 5.21.2. Exact commands for each OS are on this page.

Is CVE-2026-63001 being exploited?

CVE-2026-63001 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-63001 affect?

CVE-2026-63001 affects redaxo. Severity is medium (CVSS 4.8). REDAXO is a PHP-based content management system. Prior to 5.21.2, the mediaIsInUse() handler in redaxo/src/addons/media_manager/lib/media_manager.php inserts a Media Manager type name into raw backend warning HTML without escaping it when i

How urgent is CVE-2026-63001?

Priority 24/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-63002 MEDIUM 4.8 UPGRADE REDAXO is a PHP-based content management system
CVE-2026-63000 MEDIUM 6.4 UPGRADE REDAXO is a PHP-based content management system
CVE-2026-62998 MEDIUM 4.3 UPGRADE REDAXO is a PHP-based content management system

References

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