WordPress Core < 5.5.2 - Spam Embed on Multisite Installations

2020-10-29 00:00

David Binovec

Strategic Overview

Status

Patched in 3.7.35

Affected CoreWordPress 5.5

Affected Version3.7 – 5.5.1 · 20 branches

CVSS4.3Medium

CVECVE-2020-28033

View all WordPress 5.5 vulnerabilities

Vulnerability Overview

WordPress before 5.5.2 mishandles embeds from disabled sites on a multisite network, as demonstrated by allowing a spam embed.

Technical Analysis

REMEDIATION: Update to one of the following versions, or a newer patched version: 3.7.35, 3.8.35, 3.9.33, 4.0.32, 4.1.32, 4.2.29, 4.3.25, 4.4.24, 4.5.23, 4.6.20, 4.7.19, 4.8.15, 4.9.16, 5.0.11, 5.1.7, 5.2.8, 5.3.5, 5.4.3, 5.5.2 --- IDENTIFIER: CWE-345 (Insufficient Verification of Data Authenticity) The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

External References

https://www.cve.org/CVERecord?id=CVE-2020-28033 https://www.wordfence.com/threat-intel/vulnerabilities/id/f3ff473c-c629-487c-9b18-e074534c7b79

CVSS Vector

4.3

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

Base

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

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