CVE-2026-40597
HighCVSS 7.6Exploitation Probability (EPSS)
Low risk40th percentile - higher than 40% of all known CVEs
Summary
Vulnerability in Mantis Bug Tracker (MantisBT) versions 2.28.1 and below. An attacker can bypass Content Security Policy script-src directive by uploading a crafted attachment that, when accessed via file_download.php, is interpreted as JavaScript, enabling script execution.
Risk Assessment
Risk of malicious script execution in the user's browser context, potentially leading to session theft or data leakage.
Recommendation
Update MantisBT to version 2.28.2. Restrict attachment uploads to trusted users only.
Other vulnerabilities in MantisBT
See all- CVE-2014-9624High
CAPTCHA bypass vulnerability in MantisBT before version 1.2.19.
- CVE-2017-7615High
MantisBT through 2.3.0 allows arbitrary password reset and unauthenticated admin access via an empty confirm_hash value to verify.php.
- CVE-2014-9572High
MantisBT before 1.2.19 and 1.3.x before 1.3.0-beta.2 does not properly restrict access to /*/install.php, allowing remote attackers to obtain database credentials via the install parameter with the value 4.
- CVE-2014-9280High
The current_user_get_bug_filter function in core/current_user_api.php in MantisBT before 1.2.18 allows remote attackers to execute arbitrary PHP code via the filter parameter.
- CVE-2014-9089High
Multiple SQL injection vulnerabilities in MantisBT before version 1.2.18 in view_all_bug_page.php allow remote attackers to execute arbitrary SQL commands via the sort or dir parameter to view_all_set.php.
- CVE-2014-8554High
SQL injection vulnerability in the mc_project_get_attachments function in api/soap/mc_project_api.php in MantisBT before 1.2.18 allows remote attackers to execute arbitrary SQL commands via the project_id parameter.
- CVE-2014-1609High
Multiple SQL injection vulnerabilities in MantisBT before version 1.2.16 allow remote attackers to execute arbitrary SQL commands via unspecified parameters in various API functions.
- CVE-2026-44657High
Mantis Bug Tracker (MantisBT) prior to version 2.28.2 contains a vulnerability that allows code execution by an attacker. By using the show_inline=1 parameter and a valid file_show_inline_token CSRF token on file_download.php, an attacker can upload a crafted XHTML attachment referencing a JavaScript attachment.
- CVE-2026-44655High
In Mantis Bug Tracker (MantisBT) versions 1.3.0 through 2.28.1, an unescaped Project Name allows an attacker with manager or administrator privileges to inject HTML on the Move Attachments admin page. This vulnerability is fixed in version 2.28.2.
- CVE-2026-40607High
MantisBT versions 2.11.0 through 2.28.1 contain a stored XSS vulnerability due to incorrect escaping of a saved filter's owner. An attacker can inject arbitrary HTML if the option to show real user names is enabled.
Original NVD description (English source)
Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, given any pre-existing XSS / HTML injection vulnerability, an attacker can bypass the Content Security Policy's script-src directive by uploading a crafted attachment to any issue that, when accessed via the file_download.php link, will be downloaded with a valid JavaScript MIME type resulting in script execution. The uploaded payload must be sniffed as a valid JavaScript MIME type by PHP finfo (see file_create_finfo() API function). Non-JavaScript MIME types will not get imported in a <script> tag by the browser, due to response header X-Content-Type-Options being set to nosniff, which requires all imported JavaScript files to be a valid JavaScript MIME type. This issue has been fixed in version 2.28.2.