Cross-Site Scripting (XSS) in org.xwiki.platform:xwiki-platform-oldcore (CVE-2021-43841)
Summary
Cross-site scripting in org.xwiki.platform:xwiki-platform-oldcore (CVE-2021-43841). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 13.3RC1 or later.
Original description
The description as published by the source.
XWiki is a generic wiki platform offering runtime services for applications built on top of it. When using default XWiki configuration, it's possible for an attacker to upload an SVG containing a script executed when executing the download action on the file. This problem has been patched so that the default configuration doesn't allow to display the SVG files in the browser. Users are advised to update or to disallow uploads of SVG files.
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-2021-43841 has been found in org.xwiki.platform:xwiki-platform-oldcore.
Risk of unauthorized operations or information disclosure.
What to do: upgrade org.xwiki.platform:xwiki-platform-oldcore to 13.3RC1 or later.
If unsure, ask your IT team or search "org.xwiki.platform:xwiki-platform-oldcore CVE-2021-43841" on the vendor's site.
CVE-2021-43841 (org.xwiki.platform:xwiki-platform-oldcore) — CWE-79
Attack vector: remote (network-reachable)
Patched: 13.3RC1 — 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 org.xwiki.platform:xwiki-platform-oldcore.
Check the vendor advisory for the affected versions of org.xwiki.platform:xwiki-platform-oldcore.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 13.3RC1.
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. Audit SBOM/dependencies 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
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで org.xwiki.platform:xwiki-platform-oldcore を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade org.xwiki.platform:xwiki-platform-oldcore to 13.3RC1ステージング環境で 13.3RC1 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。
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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 github.com
- advisory nvd.nist.gov
- advisory xwiki.org
- patch github.com
- patch jira.xwiki.org
- web github.com