CVE-2026-42071Network attack vector

Authenticated attachment disclosure via omitted bugnote authorization

Published May 28, 2026 · Updated May 28, 2026

Missing authorization in MantisBT 2.23.0 through 2.28.1 allows remote authenticated users to read private bugnote attachments via APIs. The affected REST and SOAP calls invoke file access checks without passing the bugnote identifier, so private-note visibility is not evaluated. Reporter-level access is sufficient; the web UI is unaffected, and exposure is limited to attachments associated with private bugnotes.

CVSS severity7.2
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in MantisBT 2.23.0 through 2.28.1 allows remote authenticated users to read private bugnote attachments via APIs. The affected REST and SOAP calls invoke file access checks without passing the bugnote identifier, so private-note visibility is not evaluated. Reporter-level access is sufficient; the web UI is unaffected, and exposure is limited to attachments associated with private bugnotes.

The record

CVE
CVE-2026-42071
Published
May 28, 2026
Updated
May 28, 2026
Vendor
MantisBT
Product
MantisBT
Classifications
CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=>= 2.23.0, < 2.28.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MantisBT · MantisBTversion=>= 2.23.0, < 2.28.2

Published CVSS scores

7.2GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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