CVE-2021-25929: opennms horizon Cross-site Scripting
Vulnerability summary
CVE-2021-25929 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in opennms horizon. EPSS estimates a 1.02% chance of exploitation in the next 30 days, higher than 63% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 20-05-2021PublishedVulnerability first disclosed.
- 30-04-2025Last 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 there is no validation on the input being sent to the `name` parameter in `noticeWizard` endpoint. Due to this flaw an authenticated attacker could inject arbitrary script and trick other admin users into downloading malicious files.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · MavenEcosystem advisory · calculated4.8MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- NVDNIST4.8MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
1.02%
Chance of exploitation in the next 30 days
Percentile
63%
Versus all other CVEs
30-day change
0.00 pp
From 1.02% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (whitesourcesoftware.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Org.opennms1 product
- opennms≥ 1.0.0, < 27.1.1
2 vendors · 3 products
References
5 links- github.com/OpenNMS/opennms/commit/eb08b5ed4c5548f3e941a1f0d0363ae4439fa98cX Refsource MISCWEBPatchThird Party Advisory
- www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25929X Refsource MISCWEBExploitThird Party Advisory
- github.com/OpenNMS/opennms/commit/66c1f626bf38a7d1a9530b4d68598269ee5245a2X Refsource MISCWEBPatchThird Party Advisory
- github.com/OpenNMS/opennmsPACKAGE