PT-2021-22495 · Invision · Invision Community

Simon Scannell · Published 2021-08-17 · Updated 2021-08-25 · CVE-2021-39250

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Invision Community versions prior to 4.6.5.1

Description The issue allows stored XSS, with resultant code execution, because an uploaded file can be placed in an IFRAME element within user-generated content. For code execution, the attacker can rely on the ability of an admin to install widgets, disclosure of the admin session ID in a Referer header, and the ability of an admin to use the templating engine (e.g., Edit HTML).

Recommendations For versions prior to 4.6.5.1, update to version 4.6.5.1 or later to resolve the issue. As a temporary workaround, consider restricting the ability of admins to install widgets and use the templating engine until a patch is applied. Additionally, restrict access to the Edit HTML feature to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-39250

Affected Products

Invision Community

References · 6

• 🔥 https://ssd-disclosure.com/ssd-advisory-ip-board-stored-xss-to-rce-chain · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-39250 · Security Note
• https://osv.dev/vulnerability/CVE-2021-39250 · Vendor Advisory
• https://invisioncommunity.com/release-notes/4651-r102 · Vendor Advisory
• https://t.me/cvenotify/19564 · Telegram Post
• https://t.me/cibsecurity/27472 · Telegram Post