Self XSS on user input
Description
jQuery Terminal Emulator is a plugin for creating command line interpreters in your applications. Versions prior to 2.31.1 contain a low impact and limited cross-site scripting (XSS) vulnerability. The code for XSS payload is always visible, but an attacker can use other techniques to hide the code the victim sees. If the application uses the execHash option and executes code from URL, the attacker can use this URL to execute their code. The scope is limited because the javascript attribute used is added to span tag, so no automatic execution like with onerror on images is possible. This issue is fixed in version 2.31.1. As a workaround, the user can use formatting that wrap whole user input and its no op. The code for this workaround is available in the GitHub Security Advisory. The fix will only work when user of the library is not using different formatters (e.g. to highlight code in different way).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
jquery.terminalnpm | < 2.31.1 | 2.31.1 |
Affected products
2- Range: < 2.31.1
Patches
Vulnerability mechanics
Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
6- github.com/advisories/GHSA-x9r5-jxvq-4387ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-43862ghsaADVISORY
- github.com/jcubic/jquery.terminal/commit/77eb044d0896e990d48a9157f0bc6648f81a84b5ghsax_refsource_MISCWEB
- github.com/jcubic/jquery.terminal/issues/727ghsax_refsource_MISCWEB
- github.com/jcubic/jquery.terminal/releases/tag/2.31.1ghsax_refsource_MISCWEB
- github.com/jcubic/jquery.terminal/security/advisories/GHSA-x9r5-jxvq-4387ghsax_refsource_CONFIRMWEB
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