CVSS 3.1
8.2 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:HCVE-2021-44224
High (8.2). EPSS 82% chance of exploitation in the next 30 days.
A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).
Severity
- EPSS
- 82% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CWE
- CWE-476
- Published
- Modified
- Record from
- the NVD, synced
Affected
- apache:http_server
- apple:mac_os_x
- apple:macos
- debian:debian_linux
- fedoraproject:fedora
- oracle:communications_element_manager
- oracle:communications_operations_monitor
- oracle:communications_session_report_manager
- oracle:communications_session_route_manager
- oracle:http_server
- oracle:instantis_enterprisetrack
- tenable:tenable.sc