Cross-Site Scripting (XSS) in jsuites (CVE-2021-41086)
Summary
Cross-site scripting in jsuites (CVE-2021-41086). Confidential information can be exposed externally. Exploitable via innerHTML. Mitigation: upgrade to 4.9.11 or later.
Original description
The description as published by the source.
Impact
XSS against the user.
Details
jsuites is vulnerable to DOM based XSS if the user can be tricked into copying anything from a malicious and pasting it into the html editor. This is because a part of the clipboard content is directly written to innerHTML causing XSS.
References
The Curious Case of Copy & Paste – on risks of pasting arbitrary content in browsers: https://research.securitum.com/the-curious-case-of-copy-paste/
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-2021-41086 has been found in jsuites.
Attackers can target a specific entry point like innerHTML over the network to misuse the product.
Confidential information can be exposed externally.
What to do: upgrade jsuites to 4.9.11 or later.
If unsure, ask your IT team or search "jsuites CVE-2021-41086" on the vendor's site.
CVE-2021-41086 (jsuites) — CWE-79
Attack vector: remote (network-reachable)
Attack surface: innerHTML
Patched: 4.9.11 — 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 jsuites. Attackers reach the vulnerable code path via innerHTML.
Check the vendor advisory for the affected versions of jsuites. Attack surface: innerHTML.
Severity: ?. Confidential information can be exposed externally.
Update to 4.9.11.
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 'jsuites' . 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
-
1Identify exposure identify
grep -r 'jsuites' . | 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
jsuites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 jsuites to 4.9.11ステージング環境で 4.9.11 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
- web github.com
- web github.com
- web github.com
- web github.com
- web npmjs.com