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CVE-2025-54384: CKAN stored XSS vulnerability in Markdown description fields

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-29 · updated 2026-10-19
• Weakness: CWE-79

Description

CKAN is an open-source DMS (data management system) for powering data hubs and data portals. Prior to 2.10.9 and 2.11.4, the helpers.markdown_extract() function did not perform sufficient sanitization of input data before wrapping in an HTML literal element. This helper is used to render user-provided data on dataset, resource, organization or group pages (plus any page provided by an extension that used that helper function), leading to a potential XSS vector. This vulnerability has been fixed in CKAN 2.10.9 and 2.11.4.

Affected products

• ckan: from 2.11.0, < 2.11.4; before 2.10.9

References

• https://github.com/ckan/ckan/commit/6d0065f2fc7e2682196d125275af34b93e9e554e
• https://github.com/ckan/ckan/security/advisories/GHSA-2r4h-8jxv-w2j8

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