In Progress® Kendo® UI for jQuery releases starting with v2020.1.114 and prior to 2026.3.1015, the Badge text method renders string values as raw HTML without encoding, including values supplied through text binding. An attacker who can modify data bound to a Badge can supply HTML containing event handlers that execute JavaScript in a users browser when the Badge renders the value. Successful exploitation can compromise the confidentiality and integrity of data accessible to the affected application. This issue is fixed in version 2026.3.1015.
Weakness
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 component that processes web pages.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Kendo_ui | Progress | 2020.1.114 (including) | 2026.3.1015 (excluding) |
Potential Mitigations
- Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
- The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/18.html
- https://cwe.mitre.org/data/definitions/193.html
- https://cwe.mitre.org/data/definitions/32.html
- https://cwe.mitre.org/data/definitions/86.html