Cyber Resilience

CVE-2023-49339

MediumPublic PoC

Published: 13 February 2024

Published
13 February 2024
Modified
07 May 2025
KEV Added
—
Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0028 52.1th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-49339 is a medium-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Ellucian Banner. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Information Repositories (T1213); ranked in the top 47.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

Ellucian Banner 9.17 allows Insecure Direct Object Reference (IDOR) via a modified bannerId to the /StudentSelfService/ssb/studentCard/retrieveData endpoint.

CWE(s)
CWE-639

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1213 Data from Information Repositories Collection
Adversaries may leverage information repositories to mine valuable information.
attack.mitre.org →
Why these techniques?

The IDOR vulnerability in Ellucian Banner allows authenticated attackers to access unauthorized sensitive student data (personal identifiers, academic records, contact info) from the student information repository by modifying the bannerId parameter.

Affected Assets

ellucian
banner
≤ 9.17

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References