How severe is CVE-2018-15811?

CVE-2018-15811 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-15811 being actively exploited?

Yes. CVE-2018-15811 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2018-15811?

CVE-2018-15811 affects Dnnsoftware Dotnetnuke. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15811?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2018-15811 have an EU (EUVD) identifier?

Yes. CVE-2018-15811 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-0590. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2018-15811 published?

CVE-2018-15811 was published on 2019-07-03 and last updated on 2026-06-17.

CVE-2018-15811

CVE-2018-15811 is a high-severity vulnerability in Dnnsoftware Dotnetnuke with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-326.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 74% (99th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2019-0590
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-326
Affected product: Dnnsoftware Dotnetnuke
Published: 2019-07-03
Last modified: 2026-06-17

Description

DNN (aka DotNetNuke) 9.2 through 9.2.1 uses a weak encryption algorithm to protect input parameters.

Frequently asked questions

What is CVE-2018-15811?: DNN (aka DotNetNuke) 9.2 through 9.2.1 uses a weak encryption algorithm to protect input parameters.
How severe is CVE-2018-15811?: CVE-2018-15811 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-15811 being actively exploited?: Yes. CVE-2018-15811 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2018-15811?: CVE-2018-15811 affects Dnnsoftware Dotnetnuke. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15811?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2018-15811 have an EU (EUVD) identifier?: Yes. CVE-2018-15811 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-0590. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2018-15811 published?: CVE-2018-15811 was published on 2019-07-03 and last updated on 2026-06-17.

References

Affected products (1)

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

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