No exploitation reportedFix available

CVE-2019-17563

No exploitation reported by the sources we read.

Published2019-12-23
WeaknessCWE-384

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

When using FORM authentication with Apache Tomcat 9.0.0.M1 to 9.0.29, 8.5.0 to 8.5.49 and 7.0.0 to 7.0.98 there was a narrow window where an attacker could perform a session fixation attack. The window was considered too narrow for an exploit to be practical but, erring on the side of caution, this issue has been treated as a security vulnerability.

Timeline

dates in UTC

2019-12-2317:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-17563?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-17563?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apache Tomcat

Branch	Affected	Fixed in	Source
7.0	≥ 7.0.0, ≤ 7.0.98	no fix published	NVD
8.5	≥ 8.5.0, ≤ 8.5.49	no fix published	NVD
9.0	≥ 9.0.0, ≤ 9.0.29	no fix published	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
8.0	= 8.0	no fix published	NVD
9.0	= 9.0	no fix published	NVD
10.0	= 10.0	no fix published	NVD

Oracle mysql enterprise monitor

Branch	Affected	Fixed in	Source
4.0	≤ 4.0.11.5331	no fix published	NVD
8.0	≥ 8.0.0, ≤ 8.0.18.1217	no fix published	NVD

8 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-10-08
OpenCVESSVC decisionnone—
NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05.1read 2026-10-23
NVDweakness (CWE)CWE-384read 2026-10-23
FIRST EPSSEPSS score10.7 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2019-12-23
Last Modified: 2026-10-08
NVD status: Modified

Frequently asked questions

What is CVE-2019-17563?

Is CVE-2019-17563 actively exploited?

Active exploitation of CVE-2019-17563 has not been confirmed. Its EPSS score was 10.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-17563?

CVE-2019-17563 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

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