What is CVE-2025-64100?

CVE-2025-64100 is a medium-severity vulnerability in Ckan, classified under Session Fixation. CVSS score: 6.1/10. Published 2025-10-29.

How severe is CVE-2025-64100?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Ckan

CVE-2025-64100

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, session ids could be fixed by an attacker if the site is configured with server-side session storage (CKAN uses cookie-based session storage by default). The attacker would need to either set a cookie on the victim's browser or steal the victim's currently valid session. Session identifiers are now regenerated after each login. This vulnerability has been fixed in CKAN 2.10.9 and 2.11.4

EPSS: 0.003 (19.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N.

Affected products

Ckan — versions < 2.10.9, >= 2.11.0, < 2.11.4

Weakness classification (CWE)

CWE-384 — Session Fixation

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-64100?: CVE-2025-64100 is a medium-severity vulnerability in Ckan, classified under Session Fixation. CVSS score: 6.1/10. Published 2025-10-29.
How severe is CVE-2025-64100?: Medium severity. CVSS v3 base score is 6.1 out of 10.