What’s Vulnerable › Vulnerabilities

CVE-2018-20153

• Severity: medium (CVSS 5.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-12-14 · updated 2026-06-17
• Weakness: CWE-79

Description

In WordPress before 4.9.9 and 5.x before 5.0.1, contributors could modify new comments made by users with greater privileges, possibly causing XSS.

Affected products

• Debian Linux: 8.0, 9.0
• WordPress: before 4.9.9; from 5.0 before 5.0.1 — fixed in 4.9.9, 5.0.1

How to fix

Upgrade to a fixed version: WordPress 4.9.9, 5.0.1. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/106220
• https://codex.wordpress.org/Version_4.9.9
• https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html
• https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/
• https://wordpress.org/support/wordpress-version/version-5-0-1/
• https://wpvulndb.com/vulnerabilities/9172
• https://www.debian.org/security/2019/dsa-4401
• https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/
• http://www.securityfocus.com/bid/106220
• https://codex.wordpress.org/Version_4.9.9
• https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html
• https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/

Get alerted when CVE-2018-20153 or the next vulnerability affects your stack