CRLF injection vulnerability in layers_toggle.php in WebCalendar 1.0.1 might allow remote attackers to modify HTTP headers and conduct HTTP response splitting attacks via the ret parameter, which is used to redirect URL requests.

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Multiple SQL injection vulnerabilities in WebCalendar 1.0.1 allow remote attackers to execute arbitrary SQL commands via the (1) startid parameter to activity_log.php, (2) startid parameter to admin_handler.php, (3) template parameter to edit_template.php, and (4) multiple parameters to export_handler.php.

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export_handler.php in WebCalendar 1.0.1 allows remote attackers to overwrite WebCalendar data files via a modified id parameter.

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PHP remote file inclusion vulnerability in WebCalendar before 1.0.1 allows remote attackers to execute arbitrary PHP code when opening settings.php, possibly via send_reminders.php or other scripts.

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WebCalendar before 1.0.0 does not properly restrict access to assistant_edit.php, which allows remote attackers to gain privileges.

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SQL injection vulnerability in the user_valid_crypt function in user.php in WebCalendar 0.9.45 allows remote attackers to execute arbitrary SQL commands via an encoded webcalendar_session cookie.

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SQL injection vulnerability in aspWebCalendar allows remote attackers to execute arbitrary SQL statements via (1) the username field on the login page or (2) the eventid parameter to calendar.asp.

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WebCalendar allows remote attackers to gain privileges by modifying critical parameters to (1) view_entry.php or (2) upcoming.php.

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CRLF injection vulnerability in login.php in WebCalendar allows remote attackers to inject CRLF sequences via the return_path parameter and perform HTTP Response Splitting attacks to modify expected HTML content from the server.

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init.php in WebCalendar allows remote attackers to execute arbitrary local PHP scripts via the user_inc parameter.

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validate.php in WebCalendar allows remote attackers to gain sensitive information via an invalid encoded_login parameter, which reveals the full path in an error message.

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Multiple cross-site scripting (XSS) vulnerabilities in WebCalendar allow remote attackers to inject arbitrary web script via (1) view_entry.php, (2) view_d.php, (3) usersel.php, (4) datesel.php, (5) trailer.php, or (6) styles.php, as demonstrated using img srg tags.

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WebCalendar 0.9.34 and earlier with 'browsing in includes directory' enabled allows remote attackers to read arbitrary include files with .inc extensions from the web root.

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Vulnerability in WebCalendar 0.9.26 allows remote command execution.

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