CVE-2026-58263: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in xdan jodit
Jodit Editor is a WYSIWYG editor with a built-in file browser & image editor. In versions prior to 4.12.28, the built-in clean-html sanitizer can be bypassed by a MathML/<style> carrier that hides a dangerous element from the sanitizer's element walk, so a no-interaction event handler survives into the editor value, potentially causing Mutation XSS. When an application supplies attacker-influenced HTML to the editor's value-set or insertion paths, the sanitized output still contains a live <img ... onload=...> (or another non-onerror handler such as onfocus). A consumer that renders that output (element.innerHTML = editor.value) executes the handler with no user interaction. This issue has been fixed in version 4.12.28.
AI Analysis
Technical Summary
CVE-2026-58263 is a cross-site scripting vulnerability in the Jodit Editor, a WYSIWYG editor with file browsing and image editing features. In versions before 4.12.28, the editor's clean-html sanitizer can be circumvented by embedding a MathML/<style> carrier that conceals malicious elements from the sanitizer's traversal. This allows event handlers such as onload on <img> elements to survive sanitization. When attacker-controlled HTML is set or inserted into the editor's value, the sanitized output still contains live event handlers that execute automatically when rendered via element.innerHTML, leading to a mutation-based XSS. The vulnerability has been addressed in version 4.12.28.
Potential Impact
An attacker supplying crafted HTML to the editor can cause execution of arbitrary script code in the context of the application without requiring user interaction. This can lead to information disclosure and integrity impacts as indicated by the CVSS vector (Confidentiality and Integrity impacts). Availability is not affected. The vulnerability has a CVSS 3.1 score of 7.2 (high severity).
Mitigation Recommendations
This vulnerability is fixed in Jodit Editor version 4.12.28. Users should upgrade to version 4.12.28 or later to remediate this issue. There is no official patch or temporary fix indicated other than upgrading. No cloud service is involved, so remediation is the responsibility of the application using the affected versions.
CVE-2026-58263: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in xdan jodit
Description
Jodit Editor is a WYSIWYG editor with a built-in file browser & image editor. In versions prior to 4.12.28, the built-in clean-html sanitizer can be bypassed by a MathML/<style> carrier that hides a dangerous element from the sanitizer's element walk, so a no-interaction event handler survives into the editor value, potentially causing Mutation XSS. When an application supplies attacker-influenced HTML to the editor's value-set or insertion paths, the sanitized output still contains a live <img ... onload=...> (or another non-onerror handler such as onfocus). A consumer that renders that output (element.innerHTML = editor.value) executes the handler with no user interaction. This issue has been fixed in version 4.12.28.
CVSS v3.1
Score 7.2high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-58263 is a cross-site scripting vulnerability in the Jodit Editor, a WYSIWYG editor with file browsing and image editing features. In versions before 4.12.28, the editor's clean-html sanitizer can be circumvented by embedding a MathML/<style> carrier that conceals malicious elements from the sanitizer's traversal. This allows event handlers such as onload on <img> elements to survive sanitization. When attacker-controlled HTML is set or inserted into the editor's value, the sanitized output still contains live event handlers that execute automatically when rendered via element.innerHTML, leading to a mutation-based XSS. The vulnerability has been addressed in version 4.12.28.
Potential Impact
An attacker supplying crafted HTML to the editor can cause execution of arbitrary script code in the context of the application without requiring user interaction. This can lead to information disclosure and integrity impacts as indicated by the CVSS vector (Confidentiality and Integrity impacts). Availability is not affected. The vulnerability has a CVSS 3.1 score of 7.2 (high severity).
Mitigation Recommendations
This vulnerability is fixed in Jodit Editor version 4.12.28. Users should upgrade to version 4.12.28 or later to remediate this issue. There is no official patch or temporary fix indicated other than upgrading. No cloud service is involved, so remediation is the responsibility of the application using the affected versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-29T21:54:30.331Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a45818a27e9c7971923a354
Added to database: 07/01/2026, 21:07:22 UTC
Last enriched: 08/01/2026, 19:36:24 UTC
Last updated: 08/13/2026, 00:41:13 UTC
Views: 107
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.