Allow SVG Files <= 1.0 - Authenticated (Admin+) Arbitrary File Upload
Strategic Overview
- Status
- Patched in 1.1
- Affected Plugin
- Allow svg files
- Affected Version
< 1.1- CVSS
- 7.2High
- Weakness type
- CWE-434 · Unrestricted Upload of File with Dangerous Type
- CVE
CVE-2022-1939
At a glance
CVE-2022-1939 is a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Allow svg files WordPress plugin, affecting versions < 1.1. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Admin level or above. The issue is fixed in version 1.1; sites on affected versions should update now. Disclosed May 2020, reported by Luan Pedersini.
Vulnerability Overview
The Allow svg files WordPress plugin before 1.1 does not properly validate uploaded files, which could allow high privilege users such as admin to upload PHP files even when they are not allowed to
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-434: Unrestricted Upload of File with Dangerous Type
Reaching this weakness in Allow svg files < 1.1 takes an account at Admin level or above. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.
If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For Allow svg files the fix is 1.1: builds < 1.1 are affected, anything from 1.1 onward is not.
Remediation
Update to version 1.1, or a newer patched version
How does WordSec protect against this?
An attacker needs Admin access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Allow svg files 1.1 closes this, and updating the plugin is the step that ends it.
- Firewall
- Scanner
- Alerts
External References
Related records
Other vulnerabilities in Allow svg files
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