Stored XSS via unescaped project name
Published May 28, 2026 · Updated May 28, 2026
Stored XSS in MantisBT 1.3.0 through 2.28.1 allows remote authenticated users to inject HTML through a crafted project name. The Move Attachments admin page directly echoes the stored project name into a table cell without HTML escaping, so attacker-controlled markup is rendered when the page is opened. Setting a project name typically requires manager or administrator access; the resulting markup is confined to that page, and Content Security Policy restricts script execution.
Summary
What happened
Stored XSS in MantisBT 1.3.0 through 2.28.1 allows remote authenticated users to inject HTML through a crafted project name. The Move Attachments admin page directly echoes the stored project name into a table cell without HTML escaping, so attacker-controlled markup is rendered when the page is opened. Setting a project name typically requires manager or administrator access; the resulting markup is confined to that page, and Content Security Policy restricts script execution.
The record
- CVE
- CVE-2026-44655
- Published
- May 28, 2026
- Updated
- May 28, 2026
- Vendor
- MantisBT
- Product
- MantisBT
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- May 28, 2026CVE publishedPublication date reported by the CVE source.
- May 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 1.3.0, < 2.28.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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