CVE-2026-31940

EUVD-2026-21522
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, in main/lp/aicc_hacp.php, user-controlled request parameters are directly used to set the PHP session ID before loading global bootstrap. This leads to session fixation. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 13%
Affected Products (NVD)
VendorProductVersion
chamilochamilo_lms
𝑥
< 1.11.38
chamilochamilo_lms
2.0.0:alpha1
chamilochamilo_lms
2.0.0:alpha2
chamilochamilo_lms
2.0.0:alpha3
chamilochamilo_lms
2.0.0:alpha4
chamilochamilo_lms
2.0.0:alpha5
chamilochamilo_lms
2.0.0:beta1
chamilochamilo_lms
2.0.0:beta2
chamilochamilo_lms
2.0.0:beta3
chamilochamilo_lms
2.0.0:rc1
chamilochamilo_lms
2.0.0:rc2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/chamilo/chamilo-lms/commit/ce0192c62e48c9d9474d915c541b3274844afbf9
https://github.com/chamilo/chamilo-lms/commit/e337b7cc74a0276a0b4f91f9282204d20cac1869
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-4gp7-cfjh-77gv