CVE-2020-35849 MantisBT Incorrect Authorization for bug_revision_view_page.php check

What is CVE-2020-35849?

CVE-2020-35849 is a high-severity missing authorization vulnerability in Mantisbt Mantisbt, published on 30 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in MantisBT before 2.24.4. An incorrect access check in bug_revision_view_page.php allows an unprivileged attacker to view the Summary field of private issues, as well as bugnotes revisions, gaining access to potentially confidential information via the bugnote_id parameter.

Weakness: CWE-639

Which versions are affected by CVE-2020-35849?

2 open source packages ship an affected version, including mantisbt/mantisbt. It affects 1 product.

Products include Mantisbt Mantisbt.

How do I fix CVE-2020-35849?

Upgrade mantisbt/mantisbt to 2.24.4 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-35849 being exploited?

There is no known exploitation of CVE-2020-35849 in the wild and no public exploit code.

Other vulnerabilities in Mantisbt Mantisbt

• CVE-2019-15074 MantisBT allows cross-site scripting (XSS) via crafted filename Critical 9.6
• CVE-2026-30849 MantisBT SOAP API has an authentication bypass vulnerability on MySQL Critical 9.3
• CVE-2025-47776 MantisBT: Authentication bypass for some passwords due to PHP type juggling High 8.8
• CVE-2017-7615 MantisBT allows arbitrary password reset High 8.8
• CVE-2026-33517 MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation High 8.6

All Mantisbt Mantisbt vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7j8m-fm49-xgmg.