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**: Arbitrary File Upload vulnerability in the 'Online Booking & Scheduling Calendar' plugin.β¦
π‘οΈ **Root Cause**: CWE-434 (Unrestricted Upload of File with Dangerous Type). π **Flaw**: The plugin only checks the HTTP `Content-Type` header.β¦
π₯ **Affected**: WordPress Plugin: **Online Booking & Scheduling Calendar for WordPress by vcita**. π¦ **Versions**: **4.5.3 and earlier**. β οΈ Ensure you are not running these outdated versions.
Q4What can hackers do? (Privileges/Data)
π» **Attacker Capabilities**: Upload PHP/webshell files. ποΈ **Privileges**: Execute arbitrary code on the server. π **Data**: Full read/write access to site files and database.β¦
π **Auth Required**: Yes. CVSS indicates **PR:H** (Privileges Required: High). πΆ **Threshold**: Medium. You need valid WordPress admin credentials to trigger the upload endpoint. Not fully open to the public internet. π
Q6Is there a public Exp? (PoC/Wild Exploitation)
π **Public Exploit**: Yes. A PoC is available on GitHub (quetuan03/CVE-2025-54677). π§ͺ **Method**: Change `Content-Type` to `image/png` but prepend file signature `GIF87a` to bypass the weak check. π
Q7How to self-check? (Features/Scanning)
π **Self-Check**: Scan for the plugin name 'Online Booking & Scheduling Calendar for WordPress by vcita'. π **Version Check**: Verify if installed version is β€ 4.5.3.β¦
π§ **Official Fix**: The vendor (vcita) is expected to release a patch. π **Status**: CVE published 2025-08-20. β³ **Action**: Check the vendor's official WordPress repository for updates > 4.5.3 immediately.
Q9What if no patch? (Workaround)
π§ **No Patch Workaround**: 1. **Disable/Uninstall** the plugin if not essential. 2. Restrict file upload permissions via `.htaccess` or server config. 3.β¦
π₯ **Urgency**: **HIGH**. CVSS Score is **9.8** (Critical). π¨ Even with auth required, RCE is devastating. π **Action**: Patch or disable immediately upon update availability. Do not ignore this risk!