CVE-2018-19991
CVSS v3
9.8
CRITICAL
EPSS Score
2.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
VeryNginx 0.3.3 allows remote attackers to bypass the Web Application Firewall feature because there is no error handler (for get_uri_args or get_post_args) to block the API misuse described in CVE-2018-9230.
Technical details
- Published
- 2018-12-10
Frequently asked questions
What is CVE-2018-19991?
VeryNginx 0.3.3 allows remote attackers to bypass the Web Application Firewall feature because there is no error handler (for get_uri_args or get_post_args) to block the API misuse described in CVE-2018-9230.
Is CVE-2018-19991 actively exploited?
Active exploitation of CVE-2018-19991 has not been confirmed. Its EPSS score was 2.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-19991?
CVE-2018-19991 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2018-19991 affecting your environment?
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