Auth bypass in Labcup
CVE-2021-33031
In LabCup before <v2_next_18022, it is possible to use the save API to perform unauthorized actions for users without access to user management in order to, after successful exploitation, gain access to a victim's account. A user without the user-management privilege can change another user's email address if the attacker knows details of the victim such as the exact roles and group roles, ID, and remote authentication ID settings. These must be sent in a modified save API request. It was fixed in 6.3.0.03.
Vulnerability class: Broken Access Control
EPSS: 0.007 (48.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Labcup
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-33031?
- CVE-2021-33031 is a low-severity vulnerability in Labcup, classified under Missing Authorization. CVSS score: 3.1/10. Published 2021-06-10.
- How severe is CVE-2021-33031?
- Low severity. CVSS v3 base score is 3.1 out of 10.