Medium 5.3Published May 16, 2026

CVE-2021-47934MyBB Timeline Plugin 1.0 Cross-Site Scripting and CSRF

Updated under an hour ago (Oct 27, 2026, 11:00 PM ET)

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It affects MyBB Timeline Plugin. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for MyBB Timeline Plugin

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: May 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

MyBB MyBB Timeline Plugin mybb:timeline_plugin (from the name)	1.0	CNA record

References

References

https://www.exploit-db.com/exploits/49467	exploit
https://community.mybb.com/mods.php?action=view&pid=1428	product
https://www.vulncheck.com/advisories/mybb-timeline-plugin-cross-site-scripting-and-csrf	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.