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Date: Wed, 26 Nov 2014 17:58:31 +0100
From: Damien Regad <>
Subject: CVE Request: CAPTCHA bypass in MantisBT


There is a weakness on the CAPTCHA system that is used upon registration 
of a new user that could allow a malicious individual to perform a 
denial of service attack by indiscriminately creating new accounts, thus 
generating a high load on the server.

Affected versions:
<= 1.2.17

Fixed in versions:
1.2.18 (not yet released)

See Github [1]

Issue was discovered by Alejo Popovici and fixed by Victor Boctor 
(MantisBT Developer)

Further details available in our issue tracker [2]

D. Regad
MantisBT Developer


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