CVE-2025-64100: Ckan CKAN Vulnerable To Fixed Session Vulnerability

MODERATE
Advisory Identifier: GHSA-2hvh-cw5c-8q8q
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CVSS 6.1
CWE-384
Published
Advisory Summary

CVE-2025-64100 is a MODERATE (CVSS 6.1) ckan vulnerable to fixed session vulnerability (CWE-384: Session Fixation) affecting Ckan libraries in the PyPI ecosystem. The issue involves ckan vulnerable to fixed session ids. Remediation is available by upgrading affected packages to version 2.10.9, 2.11.4.

CVE-2025-64100 at a Glance

CVE Identifier CVE-2025-64100
GHSA Identifier GHSA-2hvh-cw5c-8q8q
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-384: Session Fixation
Affected Product Ckan
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2025-64100

To remediate this vulnerability, upgrade all affected Ckan dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

ckan fixed: 2.10.9 
pip install ckan>=2.10.9
ckan fixed: 2.11.4 
pip install ckan>=2.11.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show ckan

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-64100, inspect your installed packages using pip:

pip show ckan

Analyze the terminal output to locate any version of Ckan in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.10.9), your application is affected.

Note: The pip show ckan command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-384: Session Fixation, where authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. In Ckan, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact 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. ### Patches This vulnerability has been fixed in CKAN 2.10.9 and 2.11.4 ### References [https://en.wikipedia.org/wiki/Session_fixation](https://en.wikipedia.org/wiki/Session_fixation)

CVE-2025-64100 Affected Ckan Versions

2 component(s)
Fixed Versions:
2.10.92.11.4
Product / Package Ecosystem Affected Versions Fixed Version
ckan
pypi/ckan
PyPI
≥ 2.10.0
< 2.10.9
2.10.9
ckan
pypi/ckan
PyPI
≥ 2.11.0
< 2.11.4
2.11.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ckan/ckan/security/advisories/GHSA-2hvh-cw5c-8q8q
NVD — CVE-2025-64100 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64100
Security Fix Commit FIX COMMIT
https://github.com/ckan/ckan/commit/c2fe437f88be850a6edf7a32470772428819fab5
Ckan Source Repository REPOSITORY
https://github.com/ckan/ckan

Frequently Asked Questions

What is CVE-2025-64100?
CVE-2025-64100 is a security vulnerability in Ckan involving CKAN vulnerable to fixed session IDs under CWE-384: Session Fixation.
Which Ckan versions are affected?
Affected versions include releases prior to 2.10.9, 2.11.4 across affected packages: ckan.
What version fixes CVE-2025-64100?
Upgrading to 2.10.9, 2.11.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ckan affected?
Yes, ckan is affected in releases prior to 2.10.9, 2.11.4. Upgrade your dependency to 2.10.9, 2.11.4 or later.
What is the CVSS score of CVE-2025-64100?
CVE-2025-64100 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N.
What CWE is associated with CVE-2025-64100?
CVE-2025-64100 is classified under CWE-384: Session Fixation (Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.).
How can I check PyPI dependencies for CVE-2025-64100?
Run the dependency tree command: 'pip show ckan'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2hvh-cw5c-8q8q",
  "modified" : "2025-10-29T21:49:15Z",
  "published" : "2025-10-29T21:49:14Z",
  "aliases" : [ "CVE-2025-64100" ],
  "summary" : "CKAN vulnerable to fixed session IDs",
  "details" : "### Impact\n\nSession 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.\n\n### Patches\nThis vulnerability has been fixed in CKAN 2.10.9 and 2.11.4\n\n### References\n[https://en.wikipedia.org/wiki/Session_fixation](https://en.wikipedia.org/wiki/Session_fixation)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "ckan"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.10.0"
      }, {
        "fixed" : "2.10.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "ckan"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.11.0"
      }, {
        "fixed" : "2.11.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ckan/ckan/security/advisories/GHSA-2hvh-cw5c-8q8q"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-64100"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ckan/ckan/commit/c2fe437f88be850a6edf7a32470772428819fab5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ckan/ckan"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-384" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-10-29T21:49:14Z",
    "nvd_published_at" : "2025-10-29T18:15:42Z"
  }
}