What is CVE-2018-19621?

CVE-2018-19621 is a medium-severity vulnerability in Showdoc, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2018-11-28.

How severe is CVE-2018-19621?

Medium severity. CVSS v3 base score is 6.5 out of 10.

CSRF in Showdoc

CVE-2018-19621

server/index.php?s=/api/teamMember/save in ShowDoc 2.4.2 has a CSRF that can add members to a team.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2018-11-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (36.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Showdoc — versions 2.4.2

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

github.com/CCCCCrash/POCs/tree/master/Web/showdoc/csrf (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-19621?: CVE-2018-19621 is a medium-severity vulnerability in Showdoc, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2018-11-28.
How severe is CVE-2018-19621?: Medium severity. CVSS v3 base score is 6.5 out of 10.