4.8

CVE-2021-25933: opennms horizon Cross-site Scripting

CVSS: 4.8v3.1MediumModified
AliasesGHSA-jjhw-5mxp-2g2q
Published 20-05-2021Last modified 30-04-2025
Open JSON

Vulnerability summary

CVE-2021-25933 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in opennms horizon. EPSS estimates a 1.04% chance of exploitation in the next 30 days, higher than 63.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.04%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 20-05-2021
    PublishedVulnerability first disclosed.
  2. 30-04-2025
    Last modifiedVulnerability information updated.

Description

In OpenNMS Horizon, versions opennms-1-0-stable through opennms-27.1.0-1; OpenNMS Meridian, versions meridian-foundation-2015.1.0-1 through meridian-foundation-2019.1.18-1; meridian-foundation-2020.1.0-1 through meridian-foundation-2020.1.6-1 are vulnerable to Stored Cross-Site Scripting, since the function `validateFormInput()` performs improper validation checks on the input sent to the `groupName` and `groupComment` parameters. Due to this flaw, an authenticated attacker could inject arbitrary script and trick other admin users into downloading malicious files which can cause severe damage to the organization using opennms.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.04%

Chance of exploitation in the next 30 days

Percentile

64%

Versus all other CVEs

30-day change

0.00 pp

From 1.04% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.04%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (whitesourcesoftware.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Opennms2 products
  • horizon≥ 1.0, < 27.1.1
  • meridian≥ 2015.1.0, < 2019.1.19 | ≥ 2020.1.0, < 2020.1.7
Org.opennms1 product
  • opennms≥ 1.0.0, < 27.1.1

2 vendors · 3 products

References

7 links