WordPress Core < 5.5.3 - PHP Object Injection Gadget

2020-10-29 00:00

Alex Concha

Strategic Overview

Status

Patched in 3.7.35

Affected CoreWordPress 5.5

Affected Version3.7 – < 5.5.3 · 20 branches

CVSS9.8Critical

CVECVE-2021-29476

View all WordPress 5.5 vulnerabilities

Vulnerability Overview

Requests is a HTTP library written in PHP. Requests mishandles deserialization in FilteredIterator. The issue has been patched and users of `Requests` 1.6.0, 1.6.1 and 1.7.0 should update to version 1.8.0.

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, 5.1.8, 5.2.9, 5.3.6, 5.4.4, 5.5.3 --- IDENTIFIER: CWE-502 (Deserialization of Untrusted Data) The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

External References

https://www.cve.org/CVERecord?id=CVE-2021-29476 https://www.wordfence.com/threat-intel/vulnerabilities/id/6345d360-5f58-44d2-bc2d-1a20ee43e146

CVSS Vector

9.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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