CVE-2026-30849Network attack vector

Unauthenticated account takeover via SOAP password type confusion

Published Mar 23, 2026 · Updated Mar 23, 2026

Authentication bypass in MantisBT before 2.28.1 allows remote attackers to access a victim's SOAP API account via a crafted request. The mci_check_login() function accepts a non-string password and passes it into authentication, where MySQL's implicit conversion can make it compare equal to the stored credential. Exploitation requires the victim's username, an accessible SOAP API, and a MySQL-family backend; access permits SOAP operations authorized to the victim.

CVSS severity9.3
Critical
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in MantisBT before 2.28.1 allows remote attackers to access a victim's SOAP API account via a crafted request. The mci_check_login() function accepts a non-string password and passes it into authentication, where MySQL's implicit conversion can make it compare equal to the stored credential. Exploitation requires the victim's username, an accessible SOAP API, and a MySQL-family backend; access permits SOAP operations authorized to the victim.

The record

CVE
CVE-2026-30849
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
MantisBT
Product
MantisBT
Classifications
CWE-305, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 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=< 2.28.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MantisBT · MantisBTversion=< 2.28.1

Published CVSS scores

9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-305Authentication Bypass by Primary Weakness
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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