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CVE-2020-24036
high
CVSS 8.8
Unsafe Deserialization in fork-cms (CVE-2020-24036)
Summary
vulnerability in fork-cms (CVE-2020-24036). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2020-24036** has been found in fork-cms.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "fork-cms CVE-2020-24036" on the vendor's site.
CVE-2020-24036 (fork-cms) — CWE-502 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
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.
❓ What is the problem
**unsafe deserialization** (CWE-502) exists in fork-cms.
📍 Affected scope
fork-cms — .
🔥 Severity
Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'fork-cms' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'fork-cms' . | 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 `fork-cms` を grep し、稼働しているサービス・バージョンを把握する。
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7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
References
- web http://packetstormsecurity.com/files/161764/ForkCMS-PHP-Object-Injection.html
- web http://seclists.org/fulldisclosure/2021/Mar/31
- web https://tech.feedyourhead.at/content/ForkCMS-PHP-Object-Injection-CVE-2020-24036
- web https://www.ait.ac.at/themen/cyber-security/pentesting/security-advisories/ait-sa-20210215-04
- web http://forkcms.com
- web https://nvd.nist.gov/vuln/detail/CVE-2020-24036
- web https://github.com/advisories/GHSA-xvr9-jr9p-grf3