How severe is CVE-2018-1000809?

CVE-2018-1000809 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 none, integrity none, and availability high.

Is CVE-2018-1000809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000809?

CVE-2018-1000809 affects Privacyidea. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000809?

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

When was CVE-2018-1000809 published?

CVE-2018-1000809 was published on 2018-10-08 and last updated on 2026-06-17.

CVE-2018-1000809

CVE-2018-1000809 is a high-severity vulnerability in Privacyidea with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Privacyidea
Published: 2018-10-08
Last modified: 2026-06-17

Description

privacyIDEA version 2.23.1 and earlier contains a Improper Input Validation vulnerability in token validation api that can result in Denial-of-Service. This attack appear to be exploitable via http request with user=<space>&pass= to /validate/check url. This vulnerability appears to have been fixed in 2.23.2.

Frequently asked questions

What is CVE-2018-1000809?: privacyIDEA version 2.23.1 and earlier contains a Improper Input Validation vulnerability in token validation api that can result in Denial-of-Service. This attack appear to be exploitable via http request with user=<space>&pass= to /validate/check url. This vulnerability appears to have been fixed in 2.23.2.
How severe is CVE-2018-1000809?: CVE-2018-1000809 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 none, integrity none, and availability high.
Is CVE-2018-1000809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000809?: CVE-2018-1000809 affects Privacyidea. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000809?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-1000809 published?: CVE-2018-1000809 was published on 2018-10-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:privacyidea:privacyidea:*:*:*:*:*:*:*:*

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