jquery.terminal self XSS on user input
Impact
This is low impact and limited XSS, because code for XSS payload is always visible, but attacker can use other techniques to hide the code the victim sees.
Also if the application use execHash option and execute code from URL the attacker can use this URL to execute his code. The scope is limited because the javascript code inside html attribute used is added to span tag, so no automatic execution like with onerror on images is possible.
Patches
Fixed version 2.31.1
Workarounds
The user can use formatting that wrap whole user input and it's no op.
$.terminal.new_formatter([/([\s\S]+)/g, '[[;;]$1]']);The fix will only work when user of the library is not using different formatters (e.g. to highlight code in different way).
References
The issue was reported here jcubic/jquery.terminal#727
For more information
If you have any questions or comments about this advisory:
- Open an issue in jcubic/jquery.terminal
- Email us at jcubic@onet.pl
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | jquery.terminal | < 2.31.1 | 2.31.1 |
References
- https://github.com/jcubic/jquery.terminal/security/advisories/GHSA-x9r5-jxvq-4387
- https://nvd.nist.gov/vuln/detail/CVE-2021-43862
- https://github.com/jcubic/jquery.terminal/issues/727
- https://github.com/jcubic/jquery.terminal/commit/77eb044d0896e990d48a9157f0bc6648f81a84b5
- https://github.com/jcubic/jquery.terminal
- https://github.com/jcubic/jquery.terminal/releases/tag/2.31.1
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-79, CWE-80- Platform
- npm
- Package
jquery.terminal- Disclosed
- 06.01.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-x9r5-jxvq-4387 - CC BY 4.0
Vulnerability history: jquery.terminal
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 05.2019 01.2022
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 1
- Low 1
Disclosures per year
- 2019: 1
- 2020: 0
- 2021: 0
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
-
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