CVE-2018-17831

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-10-01 · updated 2026-06-17
Weakness: CWE-89

Description

In REDAXO before 5.6.3, a critical SQL injection vulnerability has been discovered in the rex_list class because of the prepareQuery function in core/lib/list.php, via the index.php?page=users/users sort parameter. Endangered was the backend and the frontend only if rex_list were used.

Affected products

redaxo: before 5.6.3 — fixed in 5.6.3

How to fix

Upgrade to a fixed version: redaxo 5.6.3. Check the vendor advisory for mitigations.

References

https://github.com/redaxo/redaxo/issues/2043
https://github.com/redaxo/redaxo/releases/tag/5.6.3
https://redaxo.org/cms/news/sicherheitsluecke-und-neue-yform-version/
https://github.com/redaxo/redaxo/issues/2043
https://github.com/redaxo/redaxo/releases/tag/5.6.3
https://redaxo.org/cms/news/sicherheitsluecke-und-neue-yform-version/

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