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PR10-06 - Cross-domain redirect on PGP Universal Web Messenger

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Advisories (Vulnerabilities) & Papers

Vulnerability found:
10 February 2010
Vendor informed:
10 February 2010
Severity level:
Jan Fry of ProCheckUp Ltd (
ProCheckUp has found that a remote URI redirection vulnerability affects the PGP Universal Web Messenger. This issue is due to a failure of the application to properly sanitize URI-supplied data assigned to the 'retryURL' parameter.

An attacker may leverage this issue to carry out convincing phishing attacks against unsuspecting users by causing an arbitrary page to be loaded once a PGP Universal Web Messenger specially-crafted URL is visited.

Vulnerable server-side script: '/b/lnj.e?'

Unfiltered parameter: 'retryURL'
Proof of concept:
Proof of concept:

Example of specially-crafted URL:


Victim users can be redirected to third-party sites for the purpose of exploiting browser vulnerabilities or performing phishing attacks.
How to fix:
The vendor has stated that this issue has now been addressed in the PGP Universal Web Messenger.
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