CVE-2026-52883
MantisBT Unauthorized Note Creation Vulnerability
Description
Unvalidated note_type Parameter in mc_issue_update SOAP Endpoint Allows creation of TIME_TRACKING and REMINDER Notes. The SOAP path passes the user-supplied note_type integer directly to bugnote_add() without validating that the user is authorized to create that type of note. If the user's access level is higher than *$g_time_tracking_view_threshold*, they can also inject arbitrary hours into billing reports. REST API also allows injection of TIME_TRACKING notes (but not REMINDER) through the same mc_issue_update() function. ### Impact An attacker with UPDATER access could: - Inject fake billable hours via TIME_TRACKING notes (note_type=2), corrupting billing data exported through MantisBT's billing reports. Organizations that bill clients based on MantisBT time tracking data would generate incorrect invoices, and corrupt time tracking reports could be used to drive project management decisions. - Fake REMINDER notes registered (but without actual sending of notifications). ### Patches - https://github.com/mantisbt/mantisbt/commit/de2f71fd88746e963386c214c3ae65a3c4c851b7 ### Workarounds None ### Resources - https://mantisbt.org/bugs/view.php?id=37081 - https://mantisbt.org/bugs/view.php?id=37200 ### Credits Thanks to the following security researchers for discovering and responsibly reporting the issue - Vishal Shukla - Psalms Christopher Matovu (@byteoverride)
INFO
Published Date :
July 15, 2026, 6:52 p.m.
Last Modified :
July 15, 2026, 6:52 p.m.
Remotely Exploit :
No
Source :
github-security-advisories
Solution
- Apply the provided patch to update MantisBT.
- Validate user access levels before creating notes.
- Sanitize all user inputs to prevent injection attacks.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-52883.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52883 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-52883
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2026-52883 vulnerability anywhere in the article.