PT-2026-41448 · Mybb · Mybb Timeline Plugin

0Xb9 · Published 2026-05-16 · Updated 2026-05-16 · CVE-2021-47934

NVD

CVSS v3.1

5.3

Medium

Base vector

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

MyBB Timeline Plugin 1.0 contains cross-site scripting vulnerabilities that allow attackers to inject malicious scripts through thread titles, post content, and user profile fields like Location and Bio. Attackers can also exploit a cross-site request forgery vulnerability in the timeline.php profile action to change a user's cover picture by crafting malicious forms that execute when victims visit affected profiles.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-47934

Affected Products

Mybb Timeline Plugin

References · 4

• 🔥 https://exploit-db.com/exploits/49467 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47934 · Security Note
• https://community.mybb.com/mods.php?action=view&pid=1428 · Note
• https://vulncheck.com/advisories/mybb-timeline-plugin-cross-site-scripting-and-csrf · Note