OMENWAVE modelled vulnerability-chaining pathways

CVE-2021-25299

Nagios XI version xi-5.7.5 is affected by cross-site scripting (XSS). The vulnerability exists in the file /usr/local/nagiosxi/html/admin/sshterm.php due to improper sanitization of user-controlled input. A maliciously crafted URL, when clicked by an admin user, can be used to steal his/her session cookies or it can be chained with the previous bugs to get one-click remote command execution (RCE) on the Nagios XI server.

6.1

CVSS Medium

97.8%

EPSS p100

no

In CISA KEV

Data as of 2 Nov 2026 · NVD, CISA KEV, EPSS

Why chaining, at machine speed

Defenders still triage vulnerabilities one CVE at a time, while increasingly automated attackers combine them at machine speed. Omenwave models the plausible pathways by which this CVE could be chained with others — surfacing them for research and awareness, with evidence for each step.

Modelled capability profile

Kill-chain stage: CRED_ACCESS
Requires: NONE access, NETWORK vector, user interaction
Grants: NONE access
Capabilities: credential accessinformation disclosuredata tampering
Model confidence: high · CVSS 3.1

Top plausible next hops

CVE-2019-15949CRED_ACCESS → EXECUTIONhigh plausibility · KEV

The source discloses credential material, which can satisfy the destination's authentication requirement.

Nagios XI before 5.6.6 allows remote command execution as root. The exploit requires access to the server as the nagios user, or access as the admin…

CVE-2021-25298CRED_ACCESS → EXECUTIONhigh plausibility · KEV

The source discloses credential material, which can satisfy the destination's authentication requirement.

Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/…

CVE-2021-25297CRED_ACCESS → EXECUTIONhigh plausibility · KEV

The source discloses credential material, which can satisfy the destination's authentication requirement.

Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/…

CVE-2019-1003030CRED_ACCESS → PRIV_ESCmedium plausibility · KEV

The source discloses credential material, which can satisfy the destination's authentication requirement.

A sandbox bypass vulnerability exists in Jenkins Pipeline: Groovy Plugin 2.63 and earlier in pom.xml, src/main/java/org/jenkinsci/plugins/workflow/cp…

CVE-2025-49704CRED_ACCESS → EXECUTIONmedium plausibility · KEV

The source discloses credential material, which can satisfy the destination's authentication requirement.

Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

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Modelled plausible chaining potential derived from public CVE metadata (CVSS, CWE, CPE). Not a confirmed real-world exploit chain and contains no exploitation detail. For research and awareness only.

Methodology · Interactive explorer · JSON: /cve/CVE-2021-25299