Vulnerability in cachethq/cachet (CVE-2021-39172)
Summary
Vulnerability in cachethq/cachet (CVE-2021-39172). Successful exploitation can lead to full system takeover. Exploitable via UpdateConfigCommandHandler. Mitigation: upgrade to 2.5.1 or later.
Original description
The description as published by the source.
Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving UpdateConfigCommandHandler and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.
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-2021-39172 has been found in cachethq/cachet.
Attackers can target a specific entry point like UpdateConfigCommandHandler over the network to misuse the product.
Successful exploitation can lead to full system takeover.
What to do: upgrade cachethq/cachet to 2.5.1 or later.
If unsure, ask your IT team or search "cachethq/cachet CVE-2021-39172" on the vendor's site.
CVE-2021-39172 (cachethq/cachet) — CWE-93
Attack vector: remote (network-reachable) / no user interaction
Attack surface: UpdateConfigCommandHandler
Patched: 2.5.1 — 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.
A vulnerability (CWE-93) exists in cachethq/cachet. Attackers reach the vulnerable code path via UpdateConfigCommandHandler.
Check the vendor advisory for the affected versions of cachethq/cachet. Attack surface: UpdateConfigCommandHandler.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 2.5.1.
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 'cachethq/cachet' . 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 'cachethq/cachet' . | 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
cachethq/cachet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 cachethq/cachet to 2.5.1ステージング環境で 2.5.1 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
- advisory github.com
- package github.com
- report blog.sonarsource.com
- web github.com
- web blog.sonarsource.com