ActivityPub <= 0.17.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Content

2023-09-25 00:00

Ben Bidner

Strategic Overview

Status

Patched in 1.0.0

Affected PluginActivityPub

Affected Version<= 0.17.0

CVSS6.4Medium

CVECVE-2023-3746

View all ActivityPub vulnerabilities

Vulnerability Overview

The ActivityPub plugin for WordPress is vulnerable to Stored Cross-Site Scripting via certain post content in versions up to, and including, 0.17.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Technical Analysis

REMEDIATION: Update to version 1.0.0, 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-2023-3746 https://www.wordfence.com/threat-intel/vulnerabilities/id/406951d8-4c61-45b3-a8a2-788921662b6c

CVSS Vector

6.4

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

Base

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

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