CVE-2026-39960
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
Mantis Bug Tracker (MantisBT) up to version 2.28.1 is vulnerable to HTML and JavaScript injection in a textarea custom field on the Update Issue page. An authenticated attacker with low privileges can inject code that executes in the administrator's browser, leading to session theft and account takeover.
Risk Assessment
An attacker can take over an admin account and gain full access to project data.
Recommendation
Update MantisBT to version 2.28.2 or apply the default CSP policy that blocks script execution.
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-2026-47156Critical
MantisBT versions 2.28.3 and earlier contain a critical authentication bypass in the SOAP API's mci_check_login() function. Any user knowing any valid cookie_string can authenticate as any other user (knowing their username), including the administrator, without knowing the target's password. The vulnerability is exploitable with zero prior access on default installations because self-registration is enabled by default.
- 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.
Original NVD description (English source)
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and below contain flawed logic that causes improper escaping of a textarea custom field's contents in the Update Issue page, (bug_update_page.php) allowing an attacker to inject HTML and, if CSP settings permit, execute arbitrary JavaScript when the page is loaded. This facilitates session theft, leading to admin account takeover, full project data access. In order to exploit this issue, a textarea-type custom field must be configured for the project, the attack must be carried out by an authenticated user with bug report permission (low privilege). This can affect any user viewing the bug edit form, including administrators. The issue has been fixed in version 2.28.2. If users cannot immediately upgrade, they can work around the issue by using the default Content-Security Policy, which blocks script execution.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS