CVE-2026-60119

MEDIUM 5.4

Hi.Events < 1.11.0 XSS via Event Title JSON.stringify Injection

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

Hi.Events before 1.11.0 contains a cross-site scripting vulnerability that allows authenticated attackers with event creation or edit permissions to inject arbitrary HTML and JavaScript by embedding a malicious event title containing the </script> sequence, which is not escaped by JSON.stringify() when embedded in inline script tags. Attackers can craft an event title that breaks out of the script context in the application/ld+json structured data block or server-side rehydrated state, causing the payload to execute in the browser of any user who views the public event page, including unauthenticated visitors and authenticated administrators.

CWE	CWE-862
Vendor	hieventsdev
Product	hi.events
Published	Jul 14, 2026
Last Updated	Jul 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

HiEventsDev / Hi.Events

0 < 1.11.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/HiEventsDev/Hi.Events/releases/tag/v.1.11.0-beta github.com: https://github.com/HiEventsDev/Hi.Events/security/advisories/GHSA-2ggx-79g6-2jmj github.com: https://github.com/HiEventsDev/Hi.Events/pull/1260 github.com: https://github.com/HiEventsDev/Hi.Events/commit/1e36b070771801ed7113255ef7b3a7f271a2a794 vulncheck.com: https://www.vulncheck.com/advisories/hi-events-beta-xss-via-event-title-json-stringify-injection

Credits

Adam Młynarczyk