Vulnerability in ImpressCMS (CVE-2021-26601)
Summary
Vulnerability in ImpressCMS (CVE-2021-26601). Data can be tampered with by attackers.
Original description
The description as published by the source.
ImpressCMS before 1.4.3 allows libraries/image-editor/image-edit.php image_temp Directory Traversal.
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-2021-26601 has been found in ImpressCMS.
Data can be tampered with by attackers.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "ImpressCMS CVE-2021-26601" on the vendor's site.
CVE-2021-26601 (ImpressCMS)
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.
A vulnerability (unclassified) exists in ImpressCMS.
Check the vendor advisory for the affected versions of ImpressCMS.
Severity: ?. Data can be tampered with by attackers.
Update to the patched release per vendor advisory.
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 'ImpressCMS' . 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 'ImpressCMS' . | 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
ImpressCMSを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-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。
References
- advisory karmainsecurity.com
- report packetstormsecurity.com
- report seclists.org
- report hackerone.com