How severe is CVE-2019-11066?

CVE-2019-11066 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-11066 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11066?

CVE-2019-11066 affects Lightopenid Project Lightopenid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11066?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-11066 published?

CVE-2019-11066 was published on 2019-05-10 and last updated on 2026-06-17.

CVE-2019-11066

CVE-2019-11066 is a critical-severity vulnerability in Lightopenid Project Lightopenid with a CVSS 3.x base score of 9.8. 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-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Lightopenid Project Lightopenid
Published: 2019-05-10
Last modified: 2026-06-17

Description

openid.php in LightOpenID through 1.3.1 allows SSRF via a crafted OpenID 2.0 assertion request using the HTTP GET method.

Frequently asked questions

What is CVE-2019-11066?: openid.php in LightOpenID through 1.3.1 allows SSRF via a crafted OpenID 2.0 assertion request using the HTTP GET method.
How severe is CVE-2019-11066?: CVE-2019-11066 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-11066 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11066?: CVE-2019-11066 affects Lightopenid Project Lightopenid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11066?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-11066 published?: CVE-2019-11066 was published on 2019-05-10 and last updated on 2026-06-17.

References

https://marc.info/?l=openid-security&m=155477050605610&w=2

Affected products (1)

cpe:2.3:a:lightopenid_project:lightopenid:*:*:*:*:*:*:*:*

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