CVE-2025-66026Public exploitNetwork attack vector

Backend JavaScript execution via unescaped media type

Published Nov 26, 2025 · Updated Nov 26, 2025

Reflected XSS in REDAXO CMS before 5.20.1 allows remote attackers to run JavaScript in an authenticated user's backend session. The Mediapool media.list.php view concatenates args[types] into a rex_view::info banner without passing the value through rex_escape. Exploitation requires a logged-in backend user to open a crafted link, exposing session data and permitting actions with that user's privileges.

CVSS severity6.1
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in REDAXO CMS before 5.20.1 allows remote attackers to run JavaScript in an authenticated user's backend session. The Mediapool media.list.php view concatenates args[types] into a rex_view::info banner without passing the value through rex_escape. Exploitation requires a logged-in backend user to open a crafted link, exposing session data and permitting actions with that user's privileges.

The record

CVE
CVE-2025-66026
Published
Nov 26, 2025
Updated
Nov 26, 2025
Vendor
REDAXO
Product
REDAXO CMS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.20.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

REDAXO · REDAXO CMSversion=< 5.20.1

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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