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CVE-2021-3703

24
FAUCET Score

CVE-2021-3703 addresses an erroneous claim that previously identified vulnerabilities (CVE-2021-27918, CVE-2021-31525, and CVE-2021-33196) were fixed in Red Hat OpenShift Serverless 1.16.0 and its client kn 1.16.0; the actual fix was implemented in Serverless 1.17.0. This vulnerability has a CVSSv3 score of 7.5 (High), indicating a network-exploitable issue with low attack complexity that could lead to high availability impact. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.17.0CPE matchmatch criteria
cpe:2.3:a:redhat:openshift_serverless:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 26th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (32)

redhatpatch availablevia redhat_api
Product: Openshift Serverless 1 on RHEL 8Fixed in: openshift-serverless-clients-0:0.23.2-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/client-kn-rhel8:0.23.2-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-apiserver-receive-adapter-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-controller-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-in-memory-channel-controller-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-in-memory-channel-dispatcher-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-mtbroker-filter-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-mtbroker-ingress-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-mtchannel-broker-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-mtping-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-storage-version-migration-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-sugar-controller-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/eventing-webhook-rhel8:0.23.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/ingress-rhel8-operator:1.17.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/knative-rhel8-operator:1.17.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/kn-cli-artifacts-rhel8:0.23.2-1
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/kourier-control-rhel8:0.23.0-4
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/net-istio-controller-rhel8:0.23.0-4
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/net-istio-webhook-rhel8:0.23.0-4
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serverless-operator-bundle:1.17.0-11
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serverless-rhel8-operator:1.17.0-5
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-activator-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-autoscaler-hpa-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-autoscaler-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-controller-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-domain-mapping-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-domain-mapping-webhook-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-queue-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-storage-version-migration-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/serving-webhook-rhel8:0.23.1-2
View patch
redhatpatch availablevia redhat_api
Product: Openshift Serverless 1.17Fixed in: openshift-serverless-1/svls-must-gather-rhel8:1.17.0-5
View patch
redhatvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2021-3703Moderate

serverless: incomplete fix for CVE-2021-27918 / CVE-2021-31525 / CVE-2021-33196

Sep 13, 2021

References

access.redhat.com / security/cve/CVE-2021-3703
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory