CVE-2021-3964 Authorization Bypass Through User-Controlled Key in elgg/elgg
Attackers can bypass authorization controls in Elgg by manipulating user-controlled keys, potentially accessing unauthorized resources.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3964?
CVE-2021-3964 is a medium-severity authentication bypass vulnerability in elgg/elgg, published on 1 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
elgg is vulnerable to Authorization Bypass Through User-Controlled Key
Weakness: CWE-639
Which versions are affected by CVE-2021-3964?
2 open source packages ship an affected version, including elgg/elgg. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
elgg/elgg Packagist | All versions | 3.3.22 |
elgg/elgg Packagist | All versions | 3.3.22 |
Products include Elgg Elgg.
How do I fix CVE-2021-3964?
Upgrade elgg/elgg to 3.3.22 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-3964 being exploited?
There is no known exploitation of CVE-2021-3964 in the wild and no public exploit code.
Other vulnerabilities in elgg/elgg
Sources
Also known as GHSA-gwpx-q2h9-wxgx.