PT-2021-11872 · WordPress · Post Grid

Published 2021-01-01 · Updated 2021-07-21 · CVE-2020-35938

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Post Grid plugin versions prior to 2.0.73 for WordPress

Description: The issue allows remote authenticated attackers to inject arbitrary PHP objects due to insecure unserialization of data supplied in a remotely hosted crafted payload in the source parameter via AJAX. The action must be set to "post grid import xml layouts".

Recommendations: For versions prior to 2.0.73, update to version 2.0.73 or later to resolve the issue. As a temporary workaround, consider restricting access to the AJAX endpoint or disabling the post grid import xml layouts action until a patch is applied. Avoid using the source parameter in the affected AJAX endpoint until the issue is resolved.

Exploit

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2020-35938

Affected Products

Post Grid

References · 5

• 🔥 https://wordfence.com/blog/2020/10/high-severity-vulnerabilities-in-post-grid-and-team-showcase-plugins · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-35938 · Security Note
• https://osv.dev/vulnerability/CVE-2020-35938 · Vendor Advisory
• https://t.me/cvenotify/8075 · Telegram Post
• https://t.me/cibsecurity/21499 · Telegram Post