What’s Vulnerable › Vulnerabilities

CVE-2018-5776

• Severity: medium (CVSS 6.1 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: 2018-01-18 · updated 2026-06-17
• Weakness: CWE-79

Description

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

Affected products

• WordPress: before 4.9.2 — fixed in 4.9.2

How to fix

Upgrade to a fixed version: WordPress 4.9.2. Check the vendor advisory for mitigations.

References

• https://codex.wordpress.org/Version_4.9.2
• https://github.com/WordPress/WordPress/commit/3fe9cb61ee71fcfadb5e002399296fcc1198d850
• https://wordpress.org/news/2018/01/wordpress-4-9-2-security-and-maintenance-release/
• https://wpvulndb.com/vulnerabilities/9006
• https://codex.wordpress.org/Version_4.9.2
• https://github.com/WordPress/WordPress/commit/3fe9cb61ee71fcfadb5e002399296fcc1198d850
• https://wordpress.org/news/2018/01/wordpress-4-9-2-security-and-maintenance-release/
• https://wpvulndb.com/vulnerabilities/9006

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