Remote session swapping via confirmation link
Published Dec 2, 2021 · Updated Aug 3, 2024
Cross-site request forgery in BookStack before 21.11 allows remote attackers to switch a victim's session via crafted confirmation links. The email-confirmation and invitation handlers automatically logged the browser into the token's account and redirected to the application, allowing a forwarded link to place a victim in an attacker-controlled account. Exploitation requires the victim to click the link; the consequence is account/session confusion with potential access to the attacker's account context, not server compromise.
Summary
What happened
Cross-site request forgery in BookStack before 21.11 allows remote attackers to switch a victim's session via crafted confirmation links. The email-confirmation and invitation handlers automatically logged the browser into the token's account and redirected to the application, allowing a forwarded link to place a victim in an attacker-controlled account. Exploitation requires the victim to click the link; the consequence is account/session confusion with potential access to the attacker's account context, not server compromise.
The record
- CVE
- CVE-2021-3944
- Published
- Dec 2, 2021
- Updated
- Aug 3, 2024
- Vendor
- BookStack
- Product
- BookStack
- Classifications
- CWE-352, T1566.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 2, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <21.11
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.
Public exploit references
- CVE-2021-3944 registration confirmation CSRF proof of conceptproof 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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