CVE-2020-24186 — Wpdiscuz
CRITICALCVE-2020-24186 is a critical-severity (CVSS 10) Unrestricted File Upload vulnerability in gvectors wpdiscuz. 15 public exploit references exist, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.
A Remote Code Execution vulnerability exists in the gVectors wpDiscuz plugin 7.0 through 7.0.4 for WordPress, which allows unauthenticated users to upload any type of file, including…
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2020-24186 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).
Where this sits among everything scored
Of 394,803 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
A Remote Code Execution vulnerability exists in the gVectors wpDiscuz plugin 7.0 through 7.0.4 for WordPress, which allows unauthenticated users to upload any type of file, including PHP files via the wmuUploadFiles AJAX action.
Affected Products
wpdiscuzgvectorsResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
WordPress Plugin wpDiscuz 7.0.4 - Remote Code Execution (Unauthenticated)
by Fellipe Oliveira · Jun 8, 2021
Wordpress Plugin wpDiscuz 7.0.4 - Arbitrary File Upload (Unauthenticated)
by UnD3sc0n0c1d0 · Jun 7, 2021
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every gvectors wpdiscuz deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2020-24186 yet — track the gvectors wpdiscuz advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
How to detect CVE-2020-24186
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2020-24186 -u https://target- Template
- WordPress wpDiscuz <=7.0.4 - Remote Code Execution
- Severity
- critical
- Impact
- Successful exploitation of this vulnerability can lead to arbitrary code execution on the affected WordPress site.
- Remediation
- Update the wpDiscuz plugin to the latest version (>=7.0.5) to mitigate this vulnerability.
Template by ProjectDiscovery nuclei-templates (Ganofins), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2020-24186 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.