CVE-2021-30641 Unexpected URL matching with 'MergeSlashes OFF'
Attackers can bypass security controls by exploiting unexpected URL matching behavior when MergeSlashes is disabled in Apache HTTP Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-30641?
CVE-2021-30641 is a medium-severity vulnerability in Apache Http Server, published on 10 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'
Which versions are affected by CVE-2021-30641?
1 open source package ship an affected version, including apache. It affects 6 products.
| Package | Affected | Fixed in |
|---|---|---|
apache Bitnami | From 2.4.39 | 2.4.47 |
Products include Apache Http Server, Debian Debian Linux, Fedoraproject Fedora, Oracle Enterprise Manager Ops Center, Oracle Instantis Enterprisetrack, Oracle Zfs Storage Appliance Kit.
How do I fix CVE-2021-30641?
Upgrade apache to 2.4.47 or later.
Is CVE-2021-30641 being exploited?
There is no known exploitation of CVE-2021-30641 in the wild and no public exploit code.
Other vulnerabilities in Apache Http Server
Sources
Also known as ALPINE-CVE-2021-30641, AZL-6478, BIT-apache-2021-30641, CLEANSTART-2026-MG62687, DEBIAN-CVE-2021-30641, GHSA-jfgv-4796-2jw7 and 1 more.