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Fencer Vulns
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 2020-07-17 6 y ago modified 2026-06-17 4 mo 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

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, 2026-11-08).

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 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.