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CVE-2020-12666

22
FAUCET Score

CVE-2020-12666 describes an open redirect vulnerability in macaron before version 1.3.7, specifically within its static handler, affecting products like fedoraproject macaron and go-macaron. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.7CPE matchmatch criteria
cpe:2.3:a:go-macaron:macaron:*:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.38%
Probability of exploitation in next 30 days
EPSS Percentile
69.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0138 is in the 82nd percentile among its peer group of 26,220 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (14)

gopatch availablevia ghsa
Product: gopkg.in/macaron.v1Fixed in: 1.3.7
redhatpatch availablevia redhat_api
Product: Openshift Service Mesh 1.1Fixed in: kiali-0:v1.12.10.redhat2-1.el7
View patch
redhatpatch availablevia redhat_api
Product: OpenShift Service Mesh 1.1Fixed in: ior-0:1.1.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: OpenShift Service Mesh 1.1Fixed in: servicemesh-0:1.1.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: OpenShift Service Mesh 1.1Fixed in: servicemesh-cni-0:1.1.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: OpenShift Service Mesh 1.1Fixed in: servicemesh-grafana-0:6.4.3-13.el8
View patch
redhatpatch availablevia redhat_api
Product: OpenShift Service Mesh 1.1Fixed in: servicemesh-operator-0:1.1.6-2.el8
View patch
redhatpatch availablevia redhat_api
Product: OpenShift Service Mesh 1.1Fixed in: servicemesh-prometheus-0:2.14.0-14.el8
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Ceph Storage 3Fixed in: grafana
redhatvendor investigatingvia redhat_api
Product: Red Hat Ceph Storage 3Fixed in: grafana-container
redhatvendor investigatingvia redhat_api
Product: Red Hat Ceph Storage 4Fixed in: rhceph/rhceph-4-dashboard-rhel8
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift3/grafana
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-grafana
redhatvendor investigatingvia redhat_api
Product: Red Hat Storage 3Fixed in: grafana

Vendor Advisories (2)

goGHSA-733f-44f3-3frwmedium

gopkg.in/macaron.v1 Open Redirect vulnerability

May 18, 2021
redhatCVE-2020-12666Moderate

macaron: open redirect in the static handler

May 6, 2020

References

github.com / go-macaron/macaron/issues/198
ExploitThird Party Advisory
github.com / go-macaron/macaron/releases/tag/v1.3.7
Release NotesThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3QEUOHRC4EN4WZ66EVFML2UCV7ZQ63XZ