Lychee is a free, open-source photo-management tool. Prior to 7.6.1, POST /api/v2/Album::unlock has no throttle, attempt counter, backoff, CAPTCHA, or lockout. UnlockAlbumRequest::authorize() permits any caller to submit attempts, and app/Actions/Album/Unlock.php verifies each guess with Hash::check without limiting repeated failures. A remote unauthenticated attacker who knows or can obtain an album identifier can automate password guesses against a password-protected album and, if the password is recovered, gain access to its private photo collection.
This issue is fixed in version 7.6.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/LycheeOrg/Lychee/commit/592291458a3373114a21412956fd23cfcda3…
security-advisories@github.com
https://github.com/LycheeOrg/Lychee/pull/4448
security-advisories@github.com
https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.1
security-advisories@github.com
https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-48vf-fwx6-2ph6
security-advisories@github.com