CVE-2021-22876

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2021-22876
StatePUBLISHED
Assignerhackerone
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-01 18:15:12 UTC
Updated2026-10-14 11:16:52 UTC
Descriptioncurl 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-359 | CWE-200 | CWE-359 Privacy Violation (CWE-359)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1ADPDECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:N/AC:L/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Broadcom Fabric Operating System - All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Fedoraproject Fedora 32 All All All
Operating System Fedoraproject Fedora 33 All All All
Operating System Fedoraproject Fedora 34 All All All
Application Haxx Libcurl All All All All
Hardware Netapp Hci Compute Node - All All All
Application Netapp Hci Management Node - All All All
Hardware Netapp Hci Storage Node - All All All
Application Netapp Solidfire - All All All
Application Oracle Communications Billing And Revenue Management 12.0.0.3.0 All All All
Application Oracle Essbase 21.2 All All All
Application Siemens Sinec Infrastructure Network Services All All All All
Application Splunk Universal Forwarder All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Https//github.com/curl/curl affected 7.1.1 to and including 7.75.0 Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
April 2021 cURL/libcURL Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
Oracle Critical Patch Update Advisory - July 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-389290.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[SECURITY] Fedora 32 Update: curl-7.69.1-8.fc32 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
[SECURITY] [DLA 2664-1] curl security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
[SECURITY] Fedora 33 Update: curl-7.71.1-9.fc33 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
cURL: Multiple vulnerabilities (GLSA 202105-36) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
HackerOne af854a3a-2127-422b-91ae-364da2661108 hackerone.com Exploit, Issue Tracking, Patch, Third Party Advisory
curl - Automatic referer leaks credentials - CVE-2021-22876 af854a3a-2127-422b-91ae-364da2661108 curl.se Patch, Vendor Advisory
cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com Patch, Third Party Advisory
[SECURITY] Fedora 34 Update: curl-7.76.0-1.fc34 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
[SECURITY] Fedora 34 Update: curl-7.76.0-1.fc34 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 32 Update: curl-7.69.1-8.fc32 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 33 Update: curl-7.71.1-9.fc33 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159520 Oracle Enterprise Linux Security Update for curl (ELSA-2021-4511)
  • 174942 SUSE Enterprise Linux Security Update for curl (SUSE-SU-2021:1006-1)
  • 174951 SUSE Enterprise Linux Security Update for curl (SUSE-SU-2021:14707-1)
  • 174956 SUSE Enterprise Linux Security Update for curl (SUSE-SU-2021:1396-1)
  • 178522 Debian Security Update for curl (DSA 4881-1)
  • 178600 Debian Security Update for curl (DLA 2664-1)
  • 180068 Debian Security Update for curl (CVE-2021-22876)
  • 198316 Ubuntu Security Notification for Curl Vulnerabilities (USN-4898-1)
  • 239451 Red Hat Update for Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP8 (RHSA-2021:2472)
  • 239832 Red Hat Update for curl (RHSA-2021:4511)
  • 240217 Red Hat Update for rh-dotnet31-curl (RHSA-2022:1354)
  • 281384 Fedora Security Update for curl (FEDORA-2021-cab5c9befb)
  • 281385 Fedora Security Update for curl (FEDORA-2021-065371f385)
  • 281386 Fedora Security Update for curl (FEDORA-2021-26a293c72b)
  • 296059 Oracle Solaris 11.4 Support Repository Update (SRU) 36.0.1.101.2 Missing (CPUJUL2021)
  • 352402 Amazon Linux Security Advisory for curl: ALAS2-2021-1653
  • 352482 Amazon Linux Security Advisory for curl: ALAS-2021-1509
  • 378599 Splunk Enterprise Third Party Package Updates for June (SVD-2023-0613)
  • 378883 Splunk Enterprise August Third Party Package Updates (SVD-2023-0808)
  • 500134 Alpine Linux Security Update for curl
  • 503785 Alpine Linux Security Update for curl
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670440 EulerOS Security Update for curl (EulerOS-SA-2021-2060)
  • 670451 EulerOS Security Update for curl (EulerOS-SA-2021-2049)
  • 670699 EulerOS Security Update for curl (EulerOS-SA-2021-2457)
  • 670903 EulerOS Security Update for curl (EulerOS-SA-2021-2060)
  • 690175 Free Berkeley Software Distribution (FreeBSD) Security Update for curl (b1194286-958e-11eb-9c34-080027f515ea)
  • 710078 Gentoo Linux cURL Multiple vulnerabilities (GLSA 202105-36)
  • 730155 McAfee Web Gateway Multiple Vulnerabilities(WP-3580, WP-3656, WP-3815, WP-3878, WP-3882, WP-3934,WP-3935, WP-3936, WP-3999)
  • 750055 SUSE Enterprise Linux Security Update for curl (SUSE-SU-2021:1786-1)
  • 750081 SUSE Enterprise Linux Security Update for curl (SUSE-SU-2021:1809-1)
  • 750283 OpenSUSE Security Update for curl (openSUSE-SU-2021:0510-1)
  • 900252 CBL-Mariner Linux Security Update for curl 7.76.0
  • 940095 AlmaLinux Security Update for curl (ALSA-2021:4511)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report