Cross-Site Scripting (XSS) in jquery.terminal (CVE-2021-43862)
Summary
Cross-site scripting in jquery.terminal (CVE-2021-43862). Risk of unauthorized operations or information disclosure. Exploitable via execHash. Mitigation: upgrade to 2.31.1 or later.
Original description
The description as published by the source.
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).
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2021-43862 has been found in jquery.terminal.
Attackers can target a specific entry point like execHash over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade jquery.terminal to 2.31.1 or later.
If unsure, ask your IT team or search "jquery.terminal CVE-2021-43862" on the vendor's site.
CVE-2021-43862 (jquery.terminal) — CWE-79
Attack vector: remote (network-reachable)
Attack surface: execHash / onerror
Patched: 2.31.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in jquery.terminal. Attackers reach the vulnerable code path via execHash.
Check the vendor advisory for the affected versions of jquery.terminal. Attack surface: execHash / onerror.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 2.31.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'jquery.terminal' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'jquery.terminal' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
jquery.terminalを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade jquery.terminal to 2.31.1ステージング環境で 2.31.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- advisory github.com
- patch github.com
- report github.com
- report github.com
- web github.com