CVE-2021-22876

MEDIUM

libcurl 7.1.1-7.75.0 - Credential Leak via HTTP Referer Header

Title source: llm
STIX 2.1

Description

curl 7.1.1 to and including 7.75.0 is vulnerable to an "Exposure of Private Personal Information to an Unauthorized Actor" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.

References (10)

Core 10
Core References
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1101882
Patch, Vendor Advisory x_refsource_misc
https://curl.se/docs/CVE-2021-22876.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/05/msg00019.html
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202105-36
Third Party Advisory x_refsource_misc
https://www.oracle.com//security-alerts/cpujul2021.html
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210521-0007/
Patch, Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

Scores

CVSS v3 5.3
EPSS 0.0530
EPSS Percentile 91.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-359 CWE-200
Status published
Products (15)
broadcom/fabric_operating_system
debian/debian_linux 9.0
fedoraproject/fedora 32
fedoraproject/fedora 33
fedoraproject/fedora 34
haxx/libcurl 7.1.1 - 7.75.0
netapp/hci_compute_node
netapp/hci_management_node
netapp/hci_storage_node
netapp/solidfire
... and 5 more
Published Apr 01, 2021
Tracked Since Feb 18, 2026