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Fencer Intel
high 7.5

CVE-2020-7733 json

Regular Expression Denial of Service (ReDoS)

published 6y ago modified 4mo ago also GHSA-662x-fhqg-9p8v , EUVD-2021-0967

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.5%
EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

The package ua-parser-js before 0.7.22 are vulnerable to Regular Expression Denial of Service (ReDoS) via the regex for Redmi Phones and Mi Pad Tablets UA.

Patch / fix

  • npm ua-parser-js 0.7.22
  • n/a ua-parser-js 0.7.22
  • ovirt-web-ui rhev manager 4.4 1.7.2-1.el8ev
  • ovirt-engine-ui-extensions rhev manager 4.4 1.2.7-1.el8ev

red hat advisories RHSA-2021:4626RHSA-2021:2865

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-7733 updated cvss 7.5

nodejs-ua-parser-js: Regular expression denial of service via the regex

  • Red Hat Distributed Tracing Jaeger 1 distributed-tracing/jaeger-query-rhel7, distributed-tracing/jaeger-all-in-one-rhel7 Red Hat Advanced Cluster Management for Kubernetes 2 nodejs-ua-parser-js Red Hat OpenShift Container Platform 3.11 kibana
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 4 kibana, openshift4/ose-logging-kibana6
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Storage 3 grafana
    affected: no fix available “Fix deferred”
  • Red Hat RHEL-8-RHEV-S-4.4 - Red Hat Virtualization Engine 4.4 ovirt-web-ui 1.7.2-1.el8ev, ovirt-engine-ui-extensions 1.2.7-1.el8ev
    fixed: vendor fix RHSA-2021:2865
  • Red Hat OpenShift Service Mesh 1 servicemesh-grafana, servicemesh-grafana-prometheus Red Hat OpenShift Container Platform 3.11 openshift3/grafana Red Hat OpenShift Container Platform 4 openshift4/ose-grafana Red Hat RHEL-8-RHEV-S-4.4 - Red Hat Virtualization Engine 4.4 rhvm 4.4.9.2-0.6.el8ev, rhvm 4.4.7.6-0.11.el8ev, ovirt-web-ui 1.7.0-1.el8ev, ovirt-engine 4.4.9.2-0.6.el8ev, ovirt-engine 4.4.7.6-0.11.el8ev, rhvm-branding-rhv 4.4.9-1.el8ev, +49 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.48% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • snyk.io https://snyk.io/vuln/SNYK-JS-UAPARSERJS-610226 referenced PoC, tagged "exploit" by a source, unverified
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-674665 referenced PoC, tagged "exploit" by a source, unverified
  • snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBFAISALMAN-674666 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm ua-parser-js
<0.7.22
0.7.22

Affected products

  • n/a ua-parser-js

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.