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CVE-2018-1000809

24
FAUCET Score

CVE-2018-1000809 is an Improper Input Validation vulnerability affecting privacyIDEA versions 2.23.1 and earlier, specifically within its token validation API. This flaw allows an unauthenticated attacker to trigger a Denial-of-Service by sending a crafted HTTP request to the /validate/check URL. Rated 7.5 HIGH on CVSS, the attack is network-based, low complexity, and has a high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.23.1CPE matchmatch criteria
cpe:2.3:a:privacyidea:privacyidea:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.69%
Probability of exploitation in next 30 days
EPSS Percentile
74.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0169 is in the 57th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: privacyIDEAFixed in: 2.23.2

Vendor Advisories (1)

pipGHSA-7qqv-r2q4-jxhmhigh

privacyIDEA Improper Input Validation vulnerability

Jan 14, 2019

References

github.com / privacyidea/privacyidea/commit/a3edc09beffa2104f357fe24971ea3211ce40751
PatchThird Party Advisory
github.com / privacyidea/privacyidea/issues/1227
ExploitPatchThird Party Advisory