Medium, CVSS 5.4MavenPublished
JStachio XSS vulnerability: Unescaped single quotes
CVE-2023-33962 · GHSA-gwxv-jv83-6qjr
- Affected
- Maven io.jstach:jstachio < 1.0.1
- Fixed in
- 1.0.1· Vendor fix available
- Issue
- Impact Description: JStachio fails to escape single quotes ' in HTML, allowing an attacker to inject malicious code. Reproduction Steps: Use the following template code: Set the value variable to ' onblur='alert(1). Expected Result: The resulting output should have properly escaped the single quotes and not execute the injected JavaScript code. Actual Result: The resulting output is vulnerable and renders as follows: Impact and Risk: 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. Proposed Solution: To mitigate this vulnerability, the template engine should properly escape special characters, including single quotes. Common practice is to escape ' as '. Patches - Workarounds As long as users stick with double…
Recommended action: Upgrade to 1.0.1 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.