CVE-2025-15406
Published: 01 January 2026
Summary
CVE-2025-15406 is a medium-severity Missing Authorization (CWE-862) vulnerability in Phpgurukul Online Course Registration. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 33.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and AC-6 (Least Privilege).
Deeper analysis
CVE-2025-15406 is a missing authorization vulnerability affecting PHPGurukul Online Course Registration versions up to 3.1. The flaw, tied to CWE-862 (Missing Authentication for Critical Function) and CWE-863 (Incorrect Authorization), impacts an unknown function and enables remote exploitation.
An attacker with low privileges can exploit this vulnerability over the network with low attack complexity and no user interaction required. Exploitation results in low impacts to confidentiality, integrity, and availability, as reflected in its CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L). A public exploit is available and may be used.
Advisories and related resources, including a GitHub proof-of-concept detailing broken access control at https://github.com/rsecroot/Online-Course-Registration/blob/main/Broken%20Access%20Control.md, are published on VulDB (https://vuldb.com/?ctiid.339326, https://vuldb.com/?id.339326, https://vuldb.com/?submit.728354) and the vendor site at https://phpgurukul.com/. No specific patch or mitigation details are outlined in the CVE description.
The exploit has been published, indicating potential for real-world use against unpatched instances.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-0014
Vulnerability details
A flaw has been found in PHPGurukul Online Course Registration up to 3.1. This affects an unknown function. This manipulation causes missing authorization. Remote exploitation of the attack is possible. The exploit has been published and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Missing authorization (CWE-862/863) in a public-facing PHP web application directly enables remote exploitation of the app without authentication, matching T1190.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces authorization checks on all functions, blocking the missing-authorization flaw that allows low-privilege remote access.
Limits privileges so that even authenticated users cannot reach or abuse the unprotected critical function described in the CVE.
Requires explicit access-control decisions to be made and enforced before any function is invoked, addressing the CWE-862/863 root cause.