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DotNetNuke.Core Vulnerable to Stored XSS in Scheduler LogNotes

High severity GitHub Reviewed Published Jan 27, 2026 in dnnsoftware/Dnn.Platform • Updated Jan 28, 2026

Package

nuget DotNetNuke.Core (NuGet)

Affected versions

>= 9.0.0, <= 9.13.9
>= 10.0.0, < 10.2.0

Patched versions

10.02.0

Description

Extensions could write richtext in log notes which can include scripts that would run in the PersonaBar when displayed.

References

@valadas valadas published to dnnsoftware/Dnn.Platform Jan 27, 2026
Published by the National Vulnerability Database Jan 28, 2026
Published to the GitHub Advisory Database Jan 28, 2026
Reviewed Jan 28, 2026
Last updated Jan 28, 2026

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
High
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(11th percentile)

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

CVE ID

CVE-2026-24836

GHSA ID

GHSA-2g5g-hcgh-q3rp

Source code

Credits

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