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CVE-2017-17093

• 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: 2017-12-02 · updated 2026-06-17
• Weakness: CWE-79

Description

wp-includes/general-template.php in WordPress before 4.9.1 does not properly restrict the lang attribute of an HTML element, which might allow attackers to conduct XSS attacks via the language setting of a site.

Affected products

• Debian Linux: 7.0, 8.0, 9.0
• WordPress: before 4.9.1 — fixed in 4.9.1

How to fix

Upgrade to a fixed version: WordPress 4.9.1. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/102024
• https://codex.wordpress.org/Version_4.9.1
• https://github.com/WordPress/WordPress/commit/3713ac5ebc90fb2011e98dfd691420f43da6c09a
• https://lists.debian.org/debian-lts-announce/2017/12/msg00019.html
• https://wordpress.org/news/2017/11/wordpress-4-9-1-security-and-maintenance-release/
• https://wpvulndb.com/vulnerabilities/8968
• https://www.debian.org/security/2018/dsa-4090
• http://www.securityfocus.com/bid/102024
• https://codex.wordpress.org/Version_4.9.1
• https://github.com/WordPress/WordPress/commit/3713ac5ebc90fb2011e98dfd691420f43da6c09a
• https://lists.debian.org/debian-lts-announce/2017/12/msg00019.html
• https://wordpress.org/news/2017/11/wordpress-4-9-1-security-and-maintenance-release/

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