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Fencer Intel
critical 9.0

CVE-2020-27832 json

A flaw was found in Red Hat Quay, where it has a persistent Cross-site Scripting (XSS) vulnerability when displaying a repository's notific…

published 5y ago modified 4mo ago also EUVD-2020-20331

cvss
9.0
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

A flaw was found in Red Hat Quay, where it has a persistent Cross-site Scripting (XSS) vulnerability when displaying a repository's notification. This flaw allows an attacker to trick a user into performing a malicious action to impersonate the target user. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Patch / fix

  • redhat quay 3.3.2

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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-2020-27832 updated cvss 8.0

quay: persistent XSS in repository notification display

  • Red Hat Quay v3 quay/quay-rhel8-operator v3.3.3-3, quay/quay-operator-bundle v3.3.3-3, quay/quay-openshift-bridge-rhel8-operator v3.3.3-1, quay/quay-container-security-rhel8-operator v3.3.3-2, quay/quay-openshift-bridge-rhel8-operator-metadata v3.3.2-2, quay/quay-container-security-rhel8-operator-metadata v3.3.3-4
    fixed: vendor fix RHSA-2021:0050

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

0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
NVD 2.0 6.0 AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

  • n/a quay

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

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.