Session hijacking via same-origin cookie-capture script
Published Dec 19, 2025 · Updated Dec 19, 2025
Session cookie exposure in Kimai 1.30.10 allows remote attackers to hijack user sessions after victims open attacker-planted PHP content. The proof-of-concept PHP reads the browser-supplied $_COOKIE array and writes it to PoC.txt, while Kimai configures the session cookie with SameSite=Lax. Exploitation requires a logged-in victim to visit PHP already placed under the Kimai origin, so the published artifact does not establish cross-site theft without prior server-write capability.
Summary
What happened
Session cookie exposure in Kimai 1.30.10 allows remote attackers to hijack user sessions after victims open attacker-planted PHP content. The proof-of-concept PHP reads the browser-supplied $_COOKIE array and writes it to PoC.txt, while Kimai configures the session cookie with SameSite=Lax. Exploitation requires a logged-in victim to visit PHP already placed under the Kimai origin, so the published artifact does not establish cross-site theft without prior server-write capability.
The record
- CVE
- CVE-2023-53957
- Published
- Dec 19, 2025
- Updated
- Dec 19, 2025
- Vendor
- Kimai
- Product
- Kimai
- Classifications
- CWE-1275, T1539
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 19, 2025CVE publishedPublication date reported by the CVE source.
- Dec 19, 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.
- Affected versionversion=1.30.10
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- Kimai-1.30.10 - SameSite Cookie-Vulnerability session hijackingproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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