EUVD-2026-70488
GHSA-3pm4-cw53-2cg9
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/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
Registered-user access (PR:L) over the network yields only low confidentiality impact (account metadata enumeration); no integrity or availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
Oppia's AdminRoleHandler GET endpoint in core/controllers/admin.py is decorated with open_access, allowing any registered user to enumerate privileged accounts and roles. Attackers can query the endpoint with filter_criterion parameters to retrieve usernames holding specific roles, banned flags, and managed topic identifiers without authorization.
AnalysisAI
Missing authorization on Oppia's AdminRoleHandler GET endpoint (through v3.5.2) exposes privileged account enumeration to any registered user. The endpoint in core/controllers/admin.py is decorated with open_access instead of an admin-only access control decorator, allowing authenticated non-admin users to query filter_criterion parameters and retrieve usernames holding specific roles, banned-user flags, and managed topic identifiers. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires possession of a registered (non-admin) Oppia account on the target instance - unauthenticated anonymous access is not sufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N) accurately reflects the attack surface: exploitation requires only a registered (low-privilege) account, no special conditions, and is network-accessible, but the confidentiality impact is limited to account metadata (roles, usernames, ban status) rather than credentials or sensitive content. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary remediation is to replace the open_access decorator on AdminRoleHandler's GET handler in core/controllers/admin.py with an appropriate admin-only access control annotation consistent with the rest of Oppia's admin controller pattern. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Oppia is an online learning platform. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no a
Oppia 3.1.4 does not verify that certain URLs are valid before navigating to them. Rated medium severity (CVSS 6.1), thi
Same weakness CWE-862 – Missing Authorization
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External POC / Exploit Code
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