Unsafe Deserialization in yiisoft/yii2 (CVE-2020-15148)
Summary
Vulnerability in yiisoft/yii2 (CVE-2020-15148). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 2.0.38 or later.
Original description
The description as published by the source.
Yii 2 (yiisoft/yii2) before version 2.0.38 is vulnerable to remote code execution if the application calls unserialize() on arbitrary user input. This is fixed in version 2.0.38. A possible workaround without upgrading is available in the linked advisory.
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-2020-15148 has been found in yiisoft/yii2.
Successful exploitation can lead to full system takeover.
What to do: upgrade yiisoft/yii2 to 2.0.38 or later.
If unsure, ask your IT team or search "yiisoft/yii2 CVE-2020-15148" on the vendor's site.
CVE-2020-15148 (yiisoft/yii2) — CWE-502
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 2.0.38 — 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.
Unsafe deserialization (CWE-502) exists in yiisoft/yii2.
Check the vendor advisory for the affected versions of yiisoft/yii2.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 2.0.38.
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 'yiisoft/yii2' . 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 'yiisoft/yii2' . | 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
yiisoft/yii2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 yiisoft/yii2 to 2.0.38ステージング環境で 2.0.38 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 github.com
- advisory nvd.nist.gov
- patch github.com
- web github.com
- web yiiframework.com