CVE-2026-33710 Chamilo LMS has Weak REST API Key Generation (Predictable)
Attackers can predict REST API keys in Chamilo LMS due to weak generation logic, allowing unauthorized access to user accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33710?
CVE-2026-33710 is a high-severity vulnerability in Chamilo Chamilo Lms, published on 10 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, REST API keys are generated using md5(time() + (user_id * 5) - rand(10000, 10000)). The rand(10000, 10000) call always returns exactly 10000 (min == max), making the formula effectively md5(timestamp + user_id*5 - 10000). An attacker who knows a username and approximate key creation time can brute-force the API key. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
Weakness: CWE-330
Which versions are affected by CVE-2026-33710?
It affects 1 product.
Products include Chamilo Chamilo Lms.
How do I fix CVE-2026-33710?
No fix has been published for CVE-2026-33710 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-33710 being exploited?
There is no known exploitation of CVE-2026-33710 in the wild and no public exploit code.
Other vulnerabilities in Chamilo Chamilo Lms
Sources
Also known as GHSA-rpmg-j327-mr39.