Unrated

Stored XSS in MantisBT print_all_bug_page_word.php

IdentifiersCVE-2026-62944CWE-79

CVE-2026-62944 is a stored cross-site scripting vulnerability in MantisBT affecting the HTML export functionality implemented in print_all_bug_page_word.php. The flaw is caused by missing output encoding of attacker-controlled image attachment filenames before they are inserted into an IMG alt attribute. By supplying a crafted attachment filename, an authenticated user can persist malicious HTML or script-bearing content that is later rendered when another user accesses the affected export page. The vulnerability arises from improper neutralization of input during web page generation, enabling stored client-side code injection in a privileged application context.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows arbitrary script execution in the browser of a user who views the affected HTML export page. This can enable session theft, unauthorized actions performed in the victim's context, access to sensitive application data visible to that user, and other browser-based post-exploitation activity. The practical impact is somewhat constrained by MantisBT's Content Security Policy, but the issue still represents a stored XSS condition with cross-user compromise potential.

Mitigation

If you can’t patch tonight, do this now.

No vendor workaround has been provided. Until patched, reduce exposure by restricting which users can upload or manage attachments and limiting access to the affected HTML export functionality where operationally feasible. Monitoring for suspicious attachment metadata and reviewing exported content before broader distribution may also reduce risk, but upgrading remains the primary corrective action.

Remediation

Patch, then assume compromise.

Upgrade MantisBT to version 2.28.4 or later, which corrects the missing output encoding in print_all_bug_page_word.php and prevents crafted attachment filenames from being rendered as active HTML in the IMG alt attribute.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

MantisbtMantisbtapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity