What is CVE-2018-19433?

CVE-2018-19433 is a medium-severity vulnerability in Showdoc, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-11-22.

How severe is CVE-2018-19433?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Showdoc

CVE-2018-19433

ShowDoc 2.4.1 has XSS via the lang parameter because install/database.php mishandles the $cur_lang value.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-11-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Showdoc — versions 2.4.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/star7th/showdoc/issues/392 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-19433?: CVE-2018-19433 is a medium-severity vulnerability in Showdoc, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-11-22.
How severe is CVE-2018-19433?: Medium severity. CVSS v3 base score is 6.1 out of 10.