This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis β
Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: A Local File Inclusion (LFI) / Path Traversal bug in ProcessWire CMS. π₯ **Consequences**: Attackers can read sensitive server files via the `download` parameter in `index.php`.β¦
π‘οΈ **Root Cause**: Improper input validation in the `download` parameter of `index.php`. π **CWE**: Path Traversal (allows accessing files outside the intended directory).
Q3Who is affected? (Versions/Components)
π₯ **Affected**: ProcessWire CMS versions **prior to 2.7.1**. π’ **Vendor**: Ryan Cramer Design. β οΈ **Note**: If you are running v2.7.1 or later, you are likely safe.
Q4What can hackers do? (Privileges/Data)
π΅οΈ **Attacker Capabilities**: Remote retrieval of sensitive files. π **Data Impact**: Can expose configuration files, source code, or system secrets. No authentication required for the initial file read.
Q5Is exploitation threshold high? (Auth/Config)
π **Threshold**: **LOW**. π **Auth**: No authentication needed. βοΈ **Config**: Exploitable via the `download` parameter in the URL. Easy to trigger remotely.
Q6Is there a public Exp? (PoC/Wild Exploitation)
π» **Public Exploit**: Yes. π **PoC Available**: GitHub repositories (e.g., `ceng-yildirim/LFI-processwire`) and Nuclei templates exist. π **Wild Exploitation**: High risk due to available automated tools.
Q7How to self-check? (Features/Scanning)
π **Self-Check**: Scan for ProcessWire instances. π§ͺ **Test**: Use the `download` parameter in `index.php` with path traversal sequences (e.g., `../../etc/passwd`). π‘ **Tools**: Use Nuclei templates for CVE-2020-27467.
Q8Is it fixed officially? (Patch/Mitigation)
π οΈ **Official Fix**: Yes. β **Patch**: Upgrade to ProcessWire CMS **version 2.7.1 or higher**. The vulnerability is resolved in this release.
Q9What if no patch? (Workaround)
π§ **No Patch Workaround**: If upgrading is impossible, restrict access to `index.php`. π« **WAF**: Block requests with path traversal characters (`../`) in the `download` parameter.β¦
β‘ **Urgency**: **HIGH**. π **Priority**: Patch immediately. π **Risk**: Unauthenticated LFI is critical. Even though it's an older CVE, unpatched legacy systems are prime targets.