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Cross-site Scripting occurrences in Gnuboard5
A vulnerability was found in gnuboard5. It has been classified as problematic. Affected is an unknown function of the file bbs/faq.php of the component FAQ Key ID Handler. The manipulation of the argument fm_id leads to cross site scripting. It is possible to launch the attack remotely. Upgrading to version 5.5.8.2.1 is able to address this issue. The name of the patch is ba062ca5b62809106d5a2f7df942ffcb44ecb5a9. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-213540. (2022-11-12, CVE-2022-3963)
gnuboard5 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (2021-12-14, CVE-2021-3831)
Cross Site Scripting (XSS) vulnerability in gnuboard5 <=v5.3.2.8 via the act parameter in bbs/move_update.php. (2021-06-24, CVE-2020-18663)
Cross Site Scripting (XSS) vulnerability in gnuboard5 <=v5.3.2.8 via the url parameter to bbs/login.php. (2021-06-24, CVE-2020-18661)
GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board tail contents" parameter, aka the adm/board_form_update.php bo_content_tail parameter. (2019-11-07, CVE-2018-18674)
GNUBOARD5 before 5.3.2.0 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board group extra contents" parameter, aka the adm/boardgroup_form_update.php gr_1~10 parameter. (2019-10-30, CVE-2018-18678)
GNUBOARD5 before 5.3.2.0 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "homepage title" parameter, aka the adm/config_form_update.php cf_title parameter. (2019-08-26, CVE-2018-18668)
GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board head contents" parameter, aka the adm/board_form_update.php bo_content_head parameter. (2019-07-23, CVE-2018-18672)
GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "Extra Contents" parameter, aka the adm/config_form_update.php cf_1~10 parameter. (2019-07-23, CVE-2018-18670)
GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "mobile board tail contents" parameter, aka the adm/board_form_update.php bo_mobile_content_tail parameter. (2019-07-23, CVE-2018-18676)
GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "mobile board title contents" parameter, aka the adm/board_form_update.php bo_mobile_subject parameter. (2019-07-23, CVE-2018-18675)
GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "Menu Link" parameter, aka the adm/menu_list_update.php me_link parameter. (2019-07-23, CVE-2018-18673)
GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "mobile board head contents" parameter, aka the adm/board_form_update.php bo_mobile_content_head parameter. (2019-07-23, CVE-2018-18671)
GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "board title contents" parameter, aka the adm/board_form_update.php bo_subject parameter. (2019-07-23, CVE-2018-18669)
Cross-Site Scripting (XSS) vulnerability in adm/boardgroup_form_update.php and adm/boardgroup_list_update.php in gnuboard5 before 5.3.1.6 allows remote attackers to inject arbitrary web script or HTML. (2019-04-26, CVE-2018-15584)
Cross-Site Scripting (XSS) vulnerability in adm/contentformupdate.php in gnuboard5 before 5.3.1.6 allows remote attackers to inject arbitrary web script or HTML. (2019-04-26, CVE-2018-15580)
Cross-Site Scripting (XSS) vulnerability in adm/faqmasterformupdate.php in gnuboard5 before 5.3.1.6 allows remote attackers to inject arbitrary web script or HTML. (2019-04-26, CVE-2018-15581)
Cross-Site Scripting (XSS) vulnerability in adm/sms_admin/num_book_write.php and adm/sms_admin/num_book_update.php in gnuboard5 before 5.3.1.6 allows remote attackers to inject arbitrary web script or HTML. (2019-04-26, CVE-2018-15582)
Cross-Site Scripting (XSS) vulnerability in newwinform.php in GNUBOARD5 before 5.3.1.6 allows remote attackers to inject arbitrary web script or HTML via the popup title parameter. (2019-03-27, CVE-2018-15585)
Cross-Site Scripting (XSS) vulnerability in point_list.php in GNUBOARD5 before 5.3.1.6 allows remote attackers to inject arbitrary web script or HTML via the popup title parameter. (2019-03-25, CVE-2018-15583)
Why Cross-site Scripting can be dangerous
Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.
The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:
https://server.com/confirmation?message=Transaction+Complete
what results in:
<span>Confirmation: Transaction Complete</span>
In that case the message can be modified to become a valid Javascript code, e.g.:
https://server.com/confirmation?message=<script>dangerous javascript code here</script>
and it will be executed locally by the user's browser with full access to the user's personal application/browser data:
<span>Confirmation: <script>dangerous javascript code here</script></span>