CVE-2021-25935

low-risk
Published 2021-05-25

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.

Do I need to act?

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0.26% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.4/10 Medium
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Opennms

References (6)

Patch https://github.com/OpenNMS/opennms/commit/101e3aa06ec9a1f8f266335fc6f5685c062c61...
Patch https://github.com/OpenNMS/opennms/commit/eb08b5ed4c5548f3e941a1f0d0363ae4439fa9...
Exploit https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25935
Patch https://github.com/OpenNMS/opennms/commit/101e3aa06ec9a1f8f266335fc6f5685c062c61...
Patch https://github.com/OpenNMS/opennms/commit/eb08b5ed4c5548f3e941a1f0d0363ae4439fa9...
Exploit https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25935
29
/ 100
low-risk
Severity 21/34 · High
Exploitability 1/34 · Minimal
Exposure 7/34 · Low