CVE Tools
Sign in

CVE-2021-20718

Published: May 20, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-400
7.5HIGH
NVD MITRE
EPSS Score
3.4%
Top 12.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-400

Affected Products

openidc
oss-projectaka cjose, mod_auth_openidc, mod auth openidc
mod auth openidcLibrary
OSS Libraries / generic-library
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
oracle
commercial·USaka oracle corp.
essbaseOn-premDatabase
Databases / data-warehouse-analytics
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
ZmartZone IAM
commercialaka zmartzone, mod_auth_openidc
Mod_auth_openidcMixed
Security Products / identity-access-mgmt
ZmartZone
oss-project
mod_auth_openidcOn-prem
Security Products / identity-access-mgmt

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-20718?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/zmartzone/mod_auth_openidc
github.com
https://jvn.jp/en/jp/JVN49704918/index.html
jvn.jp
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HJK366TLFEOIYWTHQSZO24MSDPBXHJU/
lists.fedoraproject.org
and 6 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-20718 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows