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CVE-2021-25929

MEDIUM
4.8
CVSS Score
Published: May 20, 2021 at 02:09 PM UTC
Updated: June 17, 2026 at 03:42 AM UTC
3 products affected across 1 vendorMeridianHorizonOpenNMS

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Severity
MEDIUM4.8
Exploit prediction
EPSS 1%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Horizon· Opennms
95%
1.0 ≤ v < 27.1.1
Affected range stops below 27.1.1, so it looks safe — our inference, not a vendor statement
Meridian· Opennms
95%
2015.1.0 ≤ v < 2019.1.192020.1.0 ≤ v < 2020.1.7
Affected range stops below 2019.1.19, so it looks safe — our inference, not a vendor statement
Affected range stops below 2020.1.7, so it looks safe — our inference, not a vendor statement
OpenNMS· Opennms
60%
opennms-1-0-stable,opennms-1.0.1 through opennms-27.1.0-1,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

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/OpenNMS/opennms/commit/66c1f626bf38a7d1a9530b4d68598269ee5245a2
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/OpenNMS/opennms/commit/eb08b5ed4c5548f3e941a1f0d0363ae4439fa98c
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25929

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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