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CVE-2025-52485VulnerabilityPublished Updated

CVE-2025-52485: dnnsoftware Dnn.Platform · Cross-site Scripting

Affects dnnsoftware Dnn.PlatformSource CVE Database V5

0

Not known to be exploited · CVSS 5.1 Medium : upgrade to 10.0.1 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 10.0.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Jun 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Upgrade dnnsoftware Dnn.Platform to 10.0.1.

Affected software

ProductAffectedFixed in
NuGetdnn.platformpkg:nuget/dnn.platformOther threatsAffected
  • <10.0.1 >=6.0.0
Fixed in
  • 10.0.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

1. Immediate upgrade: Organizations should upgrade all instances of Dnn.Platform to version 10.0.1 or later, where the vulnerability is patched. 2. Input validation and output encoding: Review and enhance server-side input validation and output encoding mechanisms, especially for the Activity Feed Attachments endpoint, to prevent injection of malicious scripts. 3. Content Security Policy (CSP): Implement a strict CSP header to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 4. User awareness training: Educate users about the risks of interacting with suspicious activity feeds or links, emphasizing caution with unexpected or unusual content. 5. Web Application Firewall (WAF): Deploy or update WAF rules to detect and block malicious payloads targeting the vulnerable endpoint. 6. Monitoring and logging: Enable detailed logging of activity feed interactions and monitor for anomalous requests or patterns indicative of exploitation attempts. 7. Segmentation and least privilege: Limit the exposure of the Dnn platform to only necessary users and networks, reducing the attack surface. 8. Incident response readiness: Prepare incident response plans to quickly address any detected exploitation, including session invalidation and forensic analysis.

Description

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. In versions 6.0.0 to before 10.0.1, DNN.PLATFORM allows a specially crafted request to inject scripts in the Activity Feed Attachments endpoint which will then render in the feed. This issue has been patched in version 10.0.1.

References

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