SB20261110278 - Cross-site scripting in Jodit Editor

Security Bulletin ID SB20261110278

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Data manipulation

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2026-58263)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

The vulnerability allows a remote attacker to execute arbitrary JavaScript in a victim's browser through stored cross-site scripting without user interaction.

The vulnerability exists due to improper HTML sanitization in Jodit Editor's clean-html plugin when reparsing MathML/style rawtext exposes elements whose event handlers escape subsequent filtering. A remote attacker can supply '<math><mtext><table><mglyph><style><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" onload=alert(document.domain)></style></mglyph></table></mtext></math>' through value-setting or insertion paths to execute script when a consumer renders the resulting editor output.

Remediation

Install update from vendor's website.

References

https://github.com/xdan/jodit/security/advisories/GHSA-rxcw-mc6f-6hr3