Is CVE-2026-52883 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-52883 being exploited in the wild.

How severe is CVE-2026-52883?

Medium severity, with a CVSS score of 4, published 15 July 2026.

Which products and versions are affected?

MantisBT <= 2.28.3; mantisbt/mantisbt (Packagist) <= 2.28.3, ECOSYSTEM:introduced=0,fixed=2.28.4.

Is there a fix for CVE-2026-52883?

Yes. mantisbt/mantisbt (Packagist): upgrade to 2.28.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-52883 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-52883?

Check whether you run MantisBT or mantisbt/mantisbt (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-52883: MantisBT improper input validation in REST and SOAP APIs

Q: Which products and versions are affected?

MantisBT <= 2.28.3; mantisbt/mantisbt (Packagist) <= 2.28.3, ECOSYSTEM:introduced=0,fixed=2.28.4.

Q: Is there a fix for CVE-2026-52883?

Yes. mantisbt/mantisbt (Packagist): upgrade to 2.28.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-52883 attacked?

It is attacked over the network, in a web application.

Q: Am I affected by CVE-2026-52883?

Check whether you run MantisBT or mantisbt/mantisbt (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-52883 · Severity: medium · CVSS 4 · Published 2026-07-15

MantisBT is a popular open-source bug tracking system used by organizations to manage software projects and client billing. A vulnerability in its API allows users with basic update permissions to inject unauthorized time-tracking entries and reminders. This could lead to fraudulent billable hours being added to project reports, resulting in incorrect client invoices and corrupted project management data.

Technologies: MantisBT, mantisbt/mantisbt (Packagist). Vendors: MantisBT, Packagist.

Quick answers

Is CVE-2026-52883 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-52883 being exploited in the wild.
How severe is CVE-2026-52883?: Medium severity, with a CVSS score of 4, published 15 July 2026.
Which products and versions are affected?: MantisBT <= 2.28.3; mantisbt/mantisbt (Packagist) <= 2.28.3, ECOSYSTEM:introduced=0,fixed=2.28.4.
Is there a fix for CVE-2026-52883?: Yes. mantisbt/mantisbt (Packagist): upgrade to 2.28.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-52883 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-52883?: Check whether you run MantisBT or mantisbt/mantisbt (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

mantisbt/mantisbt (Packagist): upgrade to 2.28.4 or later
```
composer require mantisbt/mantisbt:^2.28.4
```

Technical details

An improper input validation vulnerability exists in the mc_issue_update SOAP and REST API endpoints of MantisBT. The application passes a user-supplied 'note_type' integer directly to the bugnote_add() function without verifying if the user has the required authorization for that specific note type. An attacker with 'UPDATER' access can exploit this to inject 'TIME_TRACKING' (note_type=2) or 'REMINDER' notes. If the attacker's access level meets the time tracking view threshold, they can successfully inject arbitrary billable hours into the system's database. The issue is fixed in version 2.28.4.

Affected products

MantisBT MantisBT <= 2.28.3

Identifiers

CVE-2026-52883
GHSA-4vpf-w7qv-5h3q

Timeline

2026-07-15: advisory: GitHub Advisory GHSA-4vpf-w7qv-5h3q published
2026-07-15: patched: Fix committed in version 2.28.4

References

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