CVE-2022-1964

Easy SVG Support <= 3.2.0 - Cross-Site Scripting via SVG Upload

2022-06-01 00:00

Strategic Overview

Status: Patched in 3.3.0
Affected Plugin: Easy SVG Support
Affected Version: <= 3.2.0
CVSS: 5.4Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2022-1964

View all Easy SVG Support vulnerabilities

At a glance

CVE-2022-1964 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Easy SVG Support WordPress plugin, affecting versions <= 3.2.0. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). The issue is fixed in version 3.3.0; sites on affected versions should update now. Disclosed June 2022, reported by Luan Pedersini.

Vulnerability Overview

The Easy SVG Support WordPress plugin before 3.3.0 does not sanitise uploaded SVG files, which could allow users with a role as low as Author to upload a malicious SVG containing XSS payloads

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.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Easy SVG Support <= 3.2.0 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Easy SVG Support the fix is 3.3.0: builds <= 3.2.0 are affected, anything from 3.3.0 onward is not.

Remediation

Update to version 3.3.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Easy SVG Support: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Easy SVG Support 3.3.0 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-1964 https://www.wordfence.com/threat-intel/vulnerabilities/id/6e736e75-5ad4-4773-b1f7-358dc74848f0 https://nvd.nist.gov/vuln/detail/CVE-2022-1964

Related records

Same weakness class

CVSS Vector

5.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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