CVE-2026-34390

{"id": "CVE-2026-34390", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34390", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-20T13:05:44.018367Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "mantisbt", "product": "mantisbt", "versions": [{"status": "affected", "version": "< 2.28.2"}]}]}], "published": "2026-05-19T22:16:37.807", "references": [{"url": "https://github.com/mantisbt/mantisbt/commit/69e0180f180ed5acf48a8d281a73683a7bf32461", "source": "security-advisories@github.com"}, {"url": "https://github.com/mantisbt/mantisbt/security/advisories/GHSA-frf7-jhp9-jxm6", "source": "security-advisories@github.com"}, {"url": "https://mantisbt.org/bugs/view.php?id=36995", "source": "security-advisories@github.com"}, {"url": "https://mantisbt.org/bugs/view.php?id=37002", "source": "security-advisories@github.com"}, {"url": "https://mantisbt.org/bugs/view.php?id=36995", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}, {"url": "https://mantisbt.org/bugs/view.php?id=37002", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-284"}]}], "descriptions": [{"lang": "en", "value": "Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior have a Privilege Escalation vulnerability where insufficient access control checks in ProjectUsersAddCommand (manage_proj_user_add.php) allow users having manage_project_threshold access level (manager by default) to grant project-level administrator access to any user (including themselves) in any Project they have manager rights in. The normal project-user add form restricts the selectable access levels to the actor's own project role or below. However, the backend handler still accepts a forged higher access_level value and writes it. The consequences of the privilege escalation are slight, as having administrator access at Project level is effectively not very different from being manager, and it does not actually give administrator privileges on the whole MantisBT instance. In particular, it does not let the upgraded user delete the Project or grant them any access to global administrative functions such as managing Users, Projects, Plugins, Custom Fields, etc. This issue has been fixed in version 2.28.2."}, {"lang": "es", "value": "Mantis Bug Tracker (MantisBT) es un rastreador de problemas de c\u00f3digo abierto. Las versiones 2.28.1 y anteriores tienen una vulnerabilidad de escalada de privilegios donde los controles de control de acceso insuficientes en ProjectUsersAddCommand (manage_proj_user_add.PHP) permiten a los usuarios con nivel de acceso manage_project_threshold (gestor por defecto) otorgar acceso de administrador a nivel de proyecto a cualquier usuario (incluy\u00e9ndose a s\u00ed mismos) en cualquier Proyecto en el que tengan derechos de gestor. El formulario normal de adici\u00f3n de usuario de proyecto restringe los niveles de acceso seleccionables al rol de proyecto propio del actor o inferior. Sin embargo, el gestor de backend a\u00fan acepta un valor de access_level falsificado superior y lo escribe. Las consecuencias de la escalada de privilegios son leves, ya que tener acceso de administrador a nivel de Proyecto no es muy diferente de ser gestor, y en realidad no otorga privilegios de administrador en toda la instancia de MantisBT. En particular, no permite al usuario mejorado eliminar el Proyecto ni les otorga acceso a funciones administrativas globales como gestionar Usuarios, Proyectos, Plugins, Campos Personalizados, etc. Este problema ha sido solucionado en la versi\u00f3n 2.28.2."}], "lastModified": "2026-07-24T09:10:00.153", "sourceIdentifier": "security-advisories@github.com"}