CVE-2021-43257 MantisBT CSV Injection unprivileged user access in csv_export.php

What is CVE-2021-43257?

CVE-2021-43257 is a high-severity code injection vulnerability in Mantisbt Mantisbt, published on 14 Apr 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Lack of Neutralization of Formula Elements in the CSV API of MantisBT before 2.25.3 allows an unprivileged attacker to execute code or gain access to information when a user opens the csv_export.php generated CSV file in Excel.

Weakness: CWE-1236

Which versions are affected by CVE-2021-43257?

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

Products include Mantisbt Mantisbt.

How do I fix CVE-2021-43257?

Upgrade mantisbt/mantisbt to 2.25.3 or later.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2021-43257 being exploited?

There is no known exploitation of CVE-2021-43257 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-rg8f-5p7x-m6wv.