How severe is CVE-2026-40305?

CVE-2026-40305 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-40305 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40305?

CVE-2026-40305 affects Dnnsoftware Dotnetnuke. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40305?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40305 have an EU (EUVD) identifier?

Yes. CVE-2026-40305 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23553.

When was CVE-2026-40305 published?

CVE-2026-40305 was published on 2026-04-17 and last updated on 2026-06-17.

CVE-2026-40305

CVE-2026-40305 is a medium-severity vulnerability in Dnnsoftware Dotnetnuke with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23553
Weakness: CWE-285
Affected product: Dnnsoftware Dotnetnuke
Published: 2026-04-17
Last modified: 2026-06-17

Description

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Starting in version 6.0.0 and prior to version 10.2.2, in the friends feature, a user could craft a request that would force the acceptance of a friend request on another user. Version 10.2.2 patches the issue.

Frequently asked questions

What is CVE-2026-40305?: DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Starting in version 6.0.0 and prior to version 10.2.2, in the friends feature, a user could craft a request that would force the acceptance of a friend request on another user. Version 10.2.2 patches the issue.
How severe is CVE-2026-40305?: CVE-2026-40305 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-40305 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40305?: CVE-2026-40305 affects Dnnsoftware Dotnetnuke. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40305?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40305 have an EU (EUVD) identifier?: Yes. CVE-2026-40305 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23553.
When was CVE-2026-40305 published?: CVE-2026-40305 was published on 2026-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dnnsoftware:dotnetnuke:*:*:*:*:*:*:*:*

More vulnerabilities in Dnnsoftware Dotnetnuke

CVE-2025-64095 — Critical (CVSS 10.0): DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to…
CVE-2006-3601 — Critical (CVSS 10.0): ** UNVERIFIABLE ** Unspecified vulnerability in an unspecified DNN Modules module for DotNetNuke (.net nuke) allows…
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CVE-2026-24838 — Critical (CVSS 9.1): DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to…
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