What’s Vulnerable › Vulnerabilities

CVE-2021-25935

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-25 · updated 2026-06-17
• Weakness: CWE-79

Description

In OpenNMS Horizon, versions opennms-17.0.0-1 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-2020.1.7-1 are vulnerable to Stored Cross-Site Scripting, since the function `add()` performs improper validation checks on the input sent to the `foreign-source` parameter. Due to this flaw an attacker could bypass the existing regex validation and inject an arbitrary script which will be stored in the database.

Affected products

• The OpenNMS Group Horizon: from 17.0.0 through 27.1.0
• The OpenNMS Group Meridian: from 2015.1.0 through 2019.1.18; from 2020.1.0 through 2020.1.7

References

• https://github.com/OpenNMS/opennms/commit/101e3aa06ec9a1f8f266335fc6f5685c062c6117
• https://github.com/OpenNMS/opennms/commit/eb08b5ed4c5548f3e941a1f0d0363ae4439fa98c
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25935
• https://github.com/OpenNMS/opennms/commit/101e3aa06ec9a1f8f266335fc6f5685c062c6117
• https://github.com/OpenNMS/opennms/commit/eb08b5ed4c5548f3e941a1f0d0363ae4439fa98c
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25935

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