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TITLE:
LetterGrade Cross-Site Scripting and Script Insertion Vulnerabilities

SECUNIA ADVISORY ID:
SA26768

VERIFY ADVISORY:
http://secunia.com/advisories/26768/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
LetterGrade
http://secunia.com/product/15723/

DESCRIPTION:
agentsteal has reported some vulnerabilities in LetterGrade, which
can be exploited by malicious people to conduct cross-site scripting
attacks or by malicious users to conduct script-insertion attacks.

1) Input passed as e.g. a student's email address is not properly
sanitised before being used. This can be exploited to insert
arbitrary HTML and script code, which is executed in a user's browser
session in context of an affected site when the malicious data is
viewed.

2) Input passed to the "year" parameter in
genbrws/Student/cal_month.php3 is not properly sanitised before being
returned to a user. This can be exploited to execute arbitrary HTML
and script code in a user's browser session in context of an affected
site. Reportedly, other parameters in the calendar are also affected.

A full path disclosure and user enumeration weakness have also been
reported.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
agentsteal

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About:
This Advisory was delivered by Secunia as a free service to help
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