CVE-2023-33962
JStachio XSS vulnerability: Unescaped single quotes
- State
- Published
- Severity
- 5.4 Medium
- Published
- May 30, 2023
- Updated
- Jan 10, 2025
- Reserved
- May 24, 2023
Description
JStachio is a type-safe Java Mustache templating engine. Prior to version 1.0.1, JStachio fails to escape single quotes `'` in HTML, allowing an attacker to inject malicious code. This vulnerability can be exploited by an attacker to execute arbitrary JavaScript code in the context of other users visiting pages that use this template engine. This can lead to various consequences, including session hijacking, defacement of web pages, theft of sensitive information, or even the propagation of malware.
Version 1.0.1 contains a patch for this issue. To mitigate this vulnerability, the template engine should properly escape special characters, including single quotes. Common practice is to escape `'` as `'`. As a workaround, users can avoid this issue by using only double quotes `"` for HTML attributes.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N | GitHub_M |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
jstachiojstachio |
|
References
- https://github.com/jstachio/jstachio/security/advisories/GHSA-gwxv-jv83-6qjr
- https://github.com/jstachio/jstachio/issues/157
- https://github.com/jstachio/jstachio/pull/158
- https://github.com/jstachio/jstachio/commit/7b2f78377d1284df14c580be762a25af5f8dcd66
- https://github.com/jstachio/jstachio/releases/tag/v1.0.1
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