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CVE-2021-3814

25
FAUCET Score

CVE-2021-3814 describes an access control bypass vulnerability in Red Hat 3scale's APIdocs. This flaw allows the system to fall back to session authentication when an invalid access token is provided, potentially leading to unauthorized information disclosure. With a CVSS score of 7.5 (HIGH), this vulnerability is network-exploitable with low attack complexity, requiring no user interaction, and could result in significant confidentiality impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.11.0CPE matchmatch criteria
cpe:2.3:a:redhat:3scale:*:*:*:*:*:*:*:*

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:H/I:N/A:N

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

Exploit Intelligence

EPSS Score
1.14%
Probability of exploitation in next 30 days
EPSS Percentile
63.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0114 is in the 41st percentile among its peer group of 51,506 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 (11)

redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 8Fixed in: 3scale-amp2/zync-rhel8:1.14.0-3
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 7Fixed in: 3scale-amp2/3scale-rhel7-operator:1.14.0-4
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 7Fixed in: 3scale-amp2/3scale-rhel7-operator-metadata:2.11.0-16
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 7Fixed in: 3scale-amp2/apicast-rhel7-operator:1.14.0-3
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 7Fixed in: 3scale-amp2/apicast-rhel7-operator-metadata:2.11.0-9
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 7Fixed in: 3scale-amp2/memcached-rhel7:1.4.16-38
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 7Fixed in: 3scale-amp2/system-rhel7:1.15.0-8
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 8Fixed in: 3scale-amp2/apicast-gateway-rhel8:1.20.0-6
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 8Fixed in: 3scale-amp2/backend-rhel8:1.14.0-3
View patch
redhatpatch availablevia redhat_api
Product: 3scale API Management 2.11 on RHEL 8Fixed in: 3scale-amp2/toolbox-rhel8:1.6.0-7
View patch
redhatvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2021-3814Moderate

3scale: missing validation of access token

Sep 22, 2021

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory