CVE-2025-59821Network attack vector

Session data exposure via unencoded profile URLs

Published Sep 23, 2025 · Updated Sep 23, 2025

Reflected XSS in DNN Platform before 10.1.0 allows remote attackers to inject HTML into profile pages through crafted URLs. DNN's URL/path handling passes attacker-controlled path content into profile template rendering without neutralizing HTML-significant characters. A victim must open the crafted URL; the browser then interprets the injected content in the victim's session, exposing session-accessible data without changing server data.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in DNN Platform before 10.1.0 allows remote attackers to inject HTML into profile pages through crafted URLs. DNN's URL/path handling passes attacker-controlled path content into profile template rendering without neutralizing HTML-significant characters. A victim must open the crafted URL; the browser then interprets the injected content in the victim's session, exposing session-accessible data without changing server data.

The record

CVE
CVE-2025-59821
Published
Sep 23, 2025
Updated
Sep 23, 2025
Vendor
DNN Software
Product
DNN Platform
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DNN Software · DNN Platformversion=< 10.1.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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