Use-After-Free in com.adobe.acs:acs-aem-commons (CVE-2021-21028)
Summary
Vulnerability in com.adobe.acs:acs-aem-commons (CVE-2021-21028). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 4.10.0 or later.
Original description
The description as published by the source.
Impact
ACS Commons version 4.9.2 (and earlier) suffers from a Reflected Cross-site Scripting (XSS) vulnerability in version-compare and page-compare due to invalid JCR characters that are not handled correctly.
An attacker could potentially exploit this vulnerability to inject malicious JavaScript content into vulnerable form fields and execute it within the context of the victim's browser. Exploitation of this issue requires user interaction in order to be successful.
Patches
This issue has been resolved in v4.10.0
Workarounds
No workaround exist.
References
N/A
For more information
If you have any questions or comments about this advisory open an issue in acs-aem-commons.
Credit
This issue was discovered and reported by Christopher Whipp (Christopher.Whipp@servicesaustralia.gov.au).
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-2021-21028 has been found in com.adobe.acs:acs-aem-commons.
Risk of unauthorized operations or information disclosure.
What to do: upgrade com.adobe.acs:acs-aem-commons to 4.10.0 or later.
If unsure, ask your IT team or search "com.adobe.acs:acs-aem-commons CVE-2021-21028" on the vendor's site.
CVE-2021-21028 (com.adobe.acs:acs-aem-commons) — CWE-416
Attack vector: remote (network-reachable) / unauthenticated
Patched: 4.10.0 — 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.
Use-after-free (CWE-416) exists in com.adobe.acs:acs-aem-commons.
Check the vendor advisory for the affected versions of com.adobe.acs:acs-aem-commons.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 4.10.0.
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 com.adobe.acs:acs-aem-commons 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 com.adobe.acs:acs-aem-commons to 4.10.0ステージング環境で 4.10.0 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 nvd.nist.gov
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web helpx.adobe.com
- web helpx.adobe.com