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Fencer Vulns
medium 5.4

CVE-2018-16887 json

katello Cross-site Scripting vulnerability

published 2019-01-13 7 y ago modified 2026-06-17 4 mo ago also GHSA-mhhc-r88h-2qrm , EUVD-2022-4568

cvss
5.4
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

A cross-site scripting (XSS) flaw was found in the katello component of Satellite. An attacker with privilege to create/edit organizations and locations is able to execute a XSS attacks against other users through the Subscriptions or the Red Hat Repositories wizards. This can possibly lead to malicious code execution and extraction of the anti-CSRF token of higher privileged users. Versions before 3.9.0 are vulnerable.

Patch / fix

  • rubygems katello 3.9.0
  • theforeman katello 3.9.0
  • v8 satellite capsule 6.5 1:3.14.5.10-19.el7sat
  • tfm satellite capsule 6.5, satellite 6.5 5.0-3.el7sat
  • kobo satellite capsule 6.5, satellite 6.5 0.5.1-1.el7sat
  • pulp satellite capsule 6.5, satellite 6.5 2.18.1.1-1.el7sat
  • gofer satellite capsule 6.5, satellite 6.5 2.12.5-3.el7sat
  • ostree satellite capsule 6.5, satellite 6.5 2017.1-2.atomic.el7
  • SOAPpy satellite capsule 6.5, satellite 6.5 0.11.6-17.el7
  • foreman satellite capsule 6.5, satellite 6.5 1.20.1.34-1.el7sat

red hat advisories RHSA-2019:1222

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-2018-16887 updated cvss 5.4

katello: stored XSS in subscriptions and repositories pages

  • Red Hat Satellite 6.5 tfm 5.0-3.el7sat, kobo 0.5.1-1.el7sat, SOAPpy 0.11.6-17.el7, gofer 2.12.5-3.el7sat, liquibase 3.1.0-1.el7, pulp 2.18.1.1-1.el7sat, +397 more Red Hat Satellite Capsule 6.5 tfm 5.0-3.el7sat, kobo 0.5.1-1.el7sat, SOAPpy 0.11.6-17.el7, gofer 2.12.5-3.el7sat, pulp 2.18.1.1-1.el7sat, tfm-ror52 1.0-4.el7sat, +212 more
    fixed: vendor fix RHSA-2019:1222
  • Red Hat Subscription Asset Manager katello
    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

1.00% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16887 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N
GitHub 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
rubygems katello
<3.9.0
3.9.0

Affected products

  • The Katello Project katello

Classification

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

References

Sources

Fencer Vulns 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.