CVE-2021-47934CWE-79

MyBB Timeline Plugin 1.0 Cross-Site Scripting and CSRF

Medium · published May 16, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
13.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
EPSS
0.00232 · 13.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-16T15:26Z
EPSS history
Timeline
  • 16 MAY 15:26Z
    MyBB Timeline Plugin 1.0 Cross-Site Scripting and CSRF
    cvelistv5