CVE-2025-64100Network attack vector

Session hijacking via unrotated login identifier

Published Oct 29, 2025 · Updated Oct 29, 2025

Session fixation in CKAN before 2.10.9 and 2.11.0 through 2.11.3 allows remote attackers to hijack user sessions via a fixed cookie. The login view authenticates a user without directing the server-side session interface to regenerate the existing identifier, leaving the pre-login identifier valid after authentication. Exploitation requires nondefault server-side session storage plus either placing a chosen cookie in the victim's browser or obtaining the victim's valid session identifier, and it exposes only data available to that user's session.

CVSS severity6.1
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session fixation in CKAN before 2.10.9 and 2.11.0 through 2.11.3 allows remote attackers to hijack user sessions via a fixed cookie. The login view authenticates a user without directing the server-side session interface to regenerate the existing identifier, leaving the pre-login identifier valid after authentication. Exploitation requires nondefault server-side session storage plus either placing a chosen cookie in the victim's browser or obtaining the victim's valid session identifier, and it exposes only data available to that user's session.

The record

CVE
CVE-2025-64100
Published
Oct 29, 2025
Updated
Oct 29, 2025
Vendor
CKAN
Product
CKAN
Classifications
CWE-384, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.10.9
  2. Affected versionversion=>= 2.11.0, < 2.11.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CKAN · CKANversion=< 2.10.9; version=>= 2.11.0, < 2.11.4

Published CVSS scores

6.1GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-384Session Fixation
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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