C4G BLIS Improper Access Control

published 2019-11-06 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-15219

cvss: 10.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

Computing For Good's Basic Laboratory Information System (also known as C4G BLIS) version 3.5 and earlier suffers from an instance of CWE-284, "Improper Access Control." As a result, an unauthenticated user may alter several facets of a user account, including promoting any user to an administrator.

Exploit prediction

1.32% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

blog.rapid7.com https://blog.rapid7.com/2019/09/10/r7-2019-09-cve-2019-5617-cve-2019-5643-cve-2019-5644-c4g-blis-authentication-and-authorization-vulnerabilities-fixed/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Computing For Good Basic Laboratory Information System

Classification

Weakness

CWE-284 Improper Access Control
CWE-306 Missing Authentication for Critical Functionality

References

blog.rapid7.com /2019/09/10/r7-2019-09-cve-2019-5617-cve-2019-5643-cve-2019-5644-c4g-blis-authentication-and-authorization-vul
exploit, third-party-advisory

Sources

CVE List CVE-2019-5644
NVD CVE-2019-5644

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary