CVE-2026-44657

Description

Using show_inline=1 parameter and a valid file_show_inline_token CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment.

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-44657 on 2026-07-17. Shown when MITRE's text differs from the cvelistV5 mirror.

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, using show_inline=1 parameter and a valid file_show_inline_token CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. This vulnerability is fixed in 2.28.2.

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

8.8 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Effective score

8.8 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-44657

Linked Threat

CVE-2026-44657 — CVE-2026-44657

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-05-28 21:16:31 UTC

NVD last modified

2026-05-29 15:11:03 UTC

EPSS score

0.0007 (probability of exploitation in next 30 days)

EPSS percentile

22.07% vs all CVEs — higher = more likely to be exploited, as of 2026-06-03

NVD-assigned CWE(s): CWE-79 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-33023

Assigner

GitHub_M

Published

May 28, 2026, 8:25:26 PM

Updated

May 29, 2026, 2:50:03 PM

EUVD base score (CVSS 4.0)

7.5 / 10
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

EUVD-reported EPSS

0.3500

Vendors

mantisbt

Products

mantisbt (< 2.28.2)

Aliases

GHSA-p6fr-rxq7-xcg8

ENISA description: Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, using show_inline=1 parameter and a valid file_show_inline_token CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. This vulnerability is fixed in 2.28.2.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (7)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://mantisbt.org/bugs/view.php?id=37020 tenable:mantisbt.org
• https://github.com/mantisbt/mantisbt/security/advisories/GHSA-9c3j-xm6v-j7j3 tenable:github.com
• https://github.com/mantisbt/mantisbt/security/advisories/GHSA-p6fr-rxq7-xcg8 tenable:github.com
• https://github.com/mantisbt/mantisbt/commit/26647b2e68ba30b9d7987d4e03d7a16416684bc2 tenable:github.com
• https://www.first.org/epss/ tenable:www.first.org
• https://www.cve.org/CVERecord?id=CVE-2026-44657 tenable:www.cve.org
• https://nvd.nist.gov/vuln/detail/CVE-2026-44657 tenable:nvd.nist.gov

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Security Updates - Red Hat Customer Portal
  web:access.redhat.com

  Learn about our open source products, services, and company. You are here

  2026-05-26 02:56 UTC
• Security Advisory Bulletin 064 | Ubiquiti Community
  web:community.ui.com

  Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

  2026-05-26 02:56 UTC
• CVE‑2026‑44277: Critical FortiAuthenticator API Access Control Flaw ...
  web:integsec.com

  CVE‑2026‑44277 is a critical‑severity vulnerability in Fortinet's FortiAuthenticator identity‑and‑access‑management platform that allows an unauthenticated attacker to execute arbitrary code or commands on the appliance. This single vulnerability can put your corporate identity store, authentication flows, and downstream business systems into an attacker's hands, making it a ...

  2026-05-26 02:56 UTC
• Security Update Guide - Microsoft
  web:msrc.microsoft.com

  The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

  2026-05-26 02:56 UTC
• Vulnerability Remediation vs Mitigation: Which Strategy Wins in ...
  web:securityboulevard.com

  Cybersecurity vulnerabilities pose significant risks to organizations in today's digital landscape. Left unaddressed, these vulnerabilities can lead to data breaches, financial losses, and reputational damage. Organizations must decide how to tackle vulnerabilities—through remediation , mitigation , or a combination of both. But which strategy is more effective? This blog explores the ...

  2026-05-26 02:56 UTC
• CISA orders feds to patch exploited Fortinet EMS flaw by Friday
  web:www.bleepingcomputer.com

  On Monday, CISA added CVE - 2026 -35616 to its Known Exploited Vulnerabilities (KEV) Catalog and ordered Federal Civilian Executive Branch (FCEB) agencies to patch FortiClient EMS instances by ...

  2026-05-26 02:56 UTC
• A guide to vulnerability remediation vs mitigation | @Bugcrowd
  web:www.bugcrowd.com

  Vulnerability mitigation is typically considered a temporary or interim solution. While mitigation measures can reduce the immediate risk associated with vulnerabilities, they may not provide a permanent fix . Organizations should aim to prioritize and plan for complete vulnerability remediation whenever feasible and allocate resources accordingly.

  2026-05-26 02:56 UTC
• April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

  2026-05-26 02:56 UTC
• Oracle Critical Patch Update Advisory - April 2026
  web:www.oracle.com

  This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

  2026-05-26 02:56 UTC
• Vulnerability Remediation vs. Mitigation: What are the Differences ...
  web:www.secure.com

  Learn the difference between vulnerability remediation and mitigation , and how a risk-based strategy can strengthen your security posture.

  2026-05-26 02:56 UTC

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