CVE-2021-47934
MyBB Timeline Plugin 1.0 Cross-Site Scripting and CSRF
- State
- Published
- Severity
- 6.9 Medium
- Published
- May 16, 2026
- Updated
- May 18, 2026
- Reserved
- Feb 1, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
MyBB Timeline PluginMyBB |
|
References
- ExploitDB-49467exploit
- Product Referenceproduct
- VulnCheck Advisory: MyBB Timeline Plugin 1.0 Cross-Site Scripting and CSRFthird-party-advisory
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