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🛡️ CVE-2026-65841 — jodit

⚪ Unknown ✅ No Known Exploit CWE-80 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Jodit has cross-site scripting (XSS) via <script> nested in SVG that bypasses clean-html sanitization

A <script> element placed directly inside an <svg> (or MathML) container was not removed by Jodit's clean-html sanitizer.

The deny/allow tag filter compared node.nodeName against an upper-cased tag hash, but foreign (SVG/MathML) elements preserve their original-case node names — an SVG script reports "script", not "SCRIPT" — so the default denyTags list (which includes script) did not match it. The script therefore survived in the editor value and serialized output, where it could execute when the content was loaded back into a page or editor.

Proof of concept

```html

<svg xmlns="http://www.w3.org/2000/svg" width="400" height="400" viewBox="0 0 124 124">

<rect width="124" height="124" rx="24" fill="#000000"></rect>

<script type="text/javascript">alert(document.domain);</script>

</svg>

```

Load the payload into the editor (e.g. via source mode) and the <script> is preserved in editor.value and executes.

Impact

Stored / DOM cross-site scripting. An application that persists editor output and later renders or re-opens it in Jodit can have attacker-supplied script run in a victim's (e.g. an administrator's) authenticated browser context.

Patch

Fixed in 4.13.6: the deny/allow lookup now normalises the tag name to upper case before matching, so a foreign namespace can no longer bypass the filter, while allowTags is still honoured.

Workaround

Upgrade to 4.13.6 or later. Server-side sanitization of stored HTML mitigates in the interim.

Credit

Reported by Roman Kis (@CrownKingClown).

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality none, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Attack requirements: None — no deployment-specific condition has to hold.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: Passive — a victim action is involved, but not a deliberate one.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2026-65841 is classified as CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream…

Affected software

CVE-2026-65841 is recorded against 2 packages.

  • jodit
  • unknown

Timeline and source

Published on 31 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

Other advisories for this package

jodit has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)) in other software:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CWE CWE-80
Public Exploit ✅ No
Source NVD
Published 2026-07-31
Updated 2026-08-20
Modified 2026-07-31
Fix URL N/A

Affected Packages

Software From version Fixed in
jodit — —
unknown — —

Similar Threats

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