PT-2021-18215 · Grav · Grav Admin Plugin

Published 2021-04-13 · Updated 2023-11-06 · CVE-2021-29439

Positive Technologies (AI Summary)

CVSS v3.1

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Grav admin plugin versions prior to 1.10.11

Description: The issue arises from incorrect verification of caller's privileges, allowing users with the admin.login permission to install third-party plugins and their dependencies. This can lead to arbitrary code execution and privilege elevation. Blocking access to the "/admin" path from untrusted sources can reduce the probability of exploitation.

Recommendations: For versions prior to 1.10.11, update to version 1.10.11 to address the issue. As a temporary workaround, consider blocking access to the "/admin" path from untrusted sources to minimize the risk of exploitation.

Exploit

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2021-29439

GHSA-WG37-CF5X-55HQ

Affected Products

Grav Admin Plugin

References · 10

• 🔥 https://blog.sonarsource.com/grav-cms-code-execution-vulnerabilities · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-29439 · Security Note
• https://osv.dev/vulnerability/CVE-2021-29439 · Vendor Advisory
• https://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-wg37-cf5x-55hq · Note
• https://github.com/getgrav/grav-plugin-admin/commit/a220359877fd1281f76ba732e5308e0e3002e4b1 · Note
• https://t.me/pentestingnews/4071 · Telegram Post
• https://t.me/cvenotify/13455 · Telegram Post
• https://t.me/defcon_news/77514 · Telegram Post
• https://t.me/rnetsec/15047 · Telegram Post
• https://t.me/cybersecuritytechnologies/3527 · Telegram Post