Account takeover via reusable logged-out session tokens
Published Jan 18, 2022 · Updated Dec 6, 2024
Insufficient session expiration in Mattermost Boards 0.10.0 and earlier allows attackers to reuse a logged-out user's session token. The logout path fails to revoke the server-side session, while the browser retains its token in local storage without an expiration time. Exploitation requires obtaining the retained token, such as through cross-site scripting, and grants authorization as the victim with resulting account-data exposure.
Summary
What happened
Insufficient session expiration in Mattermost Boards 0.10.0 and earlier allows attackers to reuse a logged-out user's session token. The logout path fails to revoke the server-side session, while the browser retains its token in local storage without an expiration time. Exploitation requires obtaining the retained token, such as through cross-site scripting, and grants authorization as the victim with resulting account-data exposure.
The record
- CVE
- CVE-2021-37866
- Published
- Jan 18, 2022
- Updated
- Dec 6, 2024
- Vendor
- Mattermost
- Product
- Mattermost Boards
- Classifications
- CWE-613, T1550.004
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 18, 2022CVE publishedPublication date reported by the CVE source.
- Dec 6, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=unspecified <=0.10.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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