PT-2021-22912 · Jforum2 · Jforum2

Udittmer · Published 2021-09-04 · Updated 2021-09-09 · CVE-2021-40509

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 JForum2 version 2.7.0

Description The issue allows for XSS via a user signature, specifically in the ViewCommon.java file.

Recommendations For JForum2 version 2.7.0, update the ViewCommon.java file to properly sanitize user input in signatures to prevent XSS attacks.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-40509

Affected Products

Jforum2

References · 7

• 🔥 https://lists.openwall.net/full-disclosure/2021/09/03/7 · Exploit
• https://osv.dev/vulnerability/CVE-2021-40509 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-40509 · Security Note
• https://sourceforge.net/p/jforum2/code/934 · Patch
• http://packetstormsecurity.com/files/164045/jforum-2.7.0-Cross-Site-Scripting.html · Note
• https://t.me/cvenotify/20669 · Telegram Post
• http://seclists.org/fulldisclosure/2021/Sep/13 · Note