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Fencer Intel
medium 6.1

CVE-2020-15803 json

Zabbix before 3.0.32rc1, 4.x before 4.0.22rc1, 4.1.x through 4.4.x before 4.4.10rc1, and 5.x before 5.0.2rc1 allows stored XSS in the URL W…

published 6y ago modified 4mo ago also EUVD-2020-7786

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
32.3%
EPSS 32.3% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

Zabbix before 3.0.32rc1, 4.x before 4.0.22rc1, 4.1.x through 4.4.x before 4.4.10rc1, and 5.x before 5.0.2rc1 allows stored XSS in the URL Widget.

Patch / fix

  • zabbix Debian 14, Debian 13, Debian 12 1:5.0.2+dfsg-1

debian advisories DEBIAN-CVE-2020-15803

  • zabbix Ubuntu Pro 16.04 LTS 1:2.4.7+dfsg-2ubuntu2.1+esm2
  • zabbix Ubuntu Pro 18.04 LTS 1:3.0.12+dfsg-1ubuntu0.1~esm2
  • zabbix Ubuntu Pro 20.04 LTS 1:4.0.17+dfsg-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-15803

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • zabbix SLES for SAP 12 SP5, SLES 12 SP5 4.0.12-4.7.1

suse advisories SUSE-SU-2020:2251-1

  • zabbix openSUSE Leap 15.3 4.0.37-lp153.2.3.1
  • zabbix Package Hub 15 SP2, Package Hub 15 SP1, openSUSE Leap 15.2 +1 more 3.0.31-bp152.2.3.1

opensuse advisories openSUSE-SU-2022:0036-1openSUSE-SU-2020:1604-1

Is CVE-2020-15803 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2020-15803 updated cvss 6.5

zabbix: stored XSS in the URL Widget

  • Red Hat All currently supported Red Hat products
    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

32.30% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

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.