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Cross Site Scripting in Yacy
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SUMMARY
<http://www.yacy.net/yacy/> YACY is "a Java Freeware P2P-Based Search
Engine with Caching HTTP Proxy". Due to improper input filtering, YACY is
vulnerable to Cross Site Scripting attacks.
DETAILS
Vulnerable Systems:
* Yacy version 0.31
Immune Systems:
* Yacy version 0.32
Some of the input field are not filtered by the server so the input will
appear in the returned page. This allows a malicious attacker to run
JavaScript or other scripting language on a client's browser.
Proof of Concept:
To test the vulnerability, try for example:
http://[host]:8080/index.html?urlmaskfilter=<script>alert(document.cookie)</script>
http://[host]:8080/Wiki.html?page=<script>alert(document.cookie)</script>
Vendor Status:
The vendor has released version 0.32 which address this issue.
ADDITIONAL INFORMATION
The information has been provided by <mailto:fdonato@autistici.org>
Donato Ferrante.
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