CVE-2026-1127: Timeline Event History <= 3.2 - Reflected Cross-Site Scripting

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-24 · updated 2026-06-17
Weakness: CWE-79

Description

The Timeline Event History plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `id` parameter in all versions up to, and including, 3.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Affected products

wpdiscover Timeline Event History: through 3.2

References

https://plugins.trac.wordpress.org/browser/timeline-event-history/tags/3.2/includes/admin/class-timeline-wp-field-builder.php#L540
https://www.wordfence.com/threat-intel/vulnerabilities/id/ba779595-2674-4d84-bc41-889ae60bd6a4?source=cve

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