Simple Download Monitor <= 3.9.4 - Contributor+ Stored Cross-Site Scripting via File Thumbnail

2021-10-05 00:00

apple502j

Strategic Overview

Status

Patched in 3.9.5

Affected PluginSimple Download Monitor

Affected Version<= 3.9.4

CVSS9.0Critical

CVECVE-2021-24693

View all Simple Download Monitor vulnerabilities

Vulnerability Overview

The Simple Download Monitor WordPress plugin before 3.9.5 does not escape the "File Thumbnail" post meta before outputting it in some pages, which could allow users with a role as low as Contributor to perform Stored Cross-Site Scripting attacks. Given the that XSS is triggered even when the Download is in a review state, contributor could make JavaScript code execute in a context of a reviewer such as admin and make them create a rogue admin account, or install a malicious plugin

Technical Analysis

REMEDIATION: Update to version 3.9.5, or a newer patched version --- IDENTIFIER: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

External References

https://www.cve.org/CVERecord?id=CVE-2021-24693 https://www.wordfence.com/threat-intel/vulnerabilities/id/12ea26be-93e4-43de-bb32-21cdc2f80569

CVSS Vector

9.0

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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