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VulnerabilityPublished

CVE-2026-117535: redaxo core · Cross-site Scripting

Affects redaxo coreSource CVE Database V5

0

Not known to be exploited · CVSS 5.1 Medium : upgrade to 5.21.3 when convenient.

Data as of 27 Oct 2026, 11:27 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 5.21.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade core and redaxo/core to 5.21.3.

Affected software

ProductAffectedFixed in
redaxocoreAffected
  • <5.21.3
Fixed in
  • 5.21.3
GitHubredaxo/corepkg:github/redaxo/coreOther threatsAffected
  • <5.21.3
Fixed in
  • 5.21.3

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 5.21.3 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.

Description

REDAXO core versions before 5.21.3 have a reflected cross-site scripting (XSS) vulnerability in the backend media pool detail page. The vulnerability arises because the opener_link parameter is rendered without HTML escaping. An unauthenticated attacker can trick logged-in backend users with media permissions into clicking a crafted link, allowing script injection. This injected script can read the victim's CSRF token and perform actions with the victim's permissions, including code execution via template or module edits if the victim is an administrator. The issue is fixed in version 5.21.3.

References

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