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Description

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.

PUBLISHED Reserved 2026-07-08 | Published 2026-07-14 | Updated 2026-07-14 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem types

Missing Authorization

Product status

Default status
affected

Any version before 1.11.0
affected

Credits

Adam Młynarczyk finder

References

github.com/...Events/security/advisories/GHSA-2ggx-79g6-2jmj exploit

github.com/HiEventsDev/Hi.Events/releases/tag/v.1.11.0-beta (Release Notes) release-notes

github.com/...Events/security/advisories/GHSA-2ggx-79g6-2jmj (GitHub Security Advisory (GHSA-2ggx-79g6-2jmj)) vendor-advisory

github.com/HiEventsDev/Hi.Events/pull/1260 (Pull Request) issue-tracking

github.com/...ommit/1e36b070771801ed7113255ef7b3a7f271a2a794 (Patch Commit) patch

www.vulncheck.com/...ia-event-title-json-stringify-injection third-party-advisory

cve.org (CVE-2026-60119)

nvd.nist.gov (CVE-2026-60119)

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