High 7.2Published Apr 29, 2026

CVE-2018-25309MyBB Recent threads 17.0 Persistent Cross-Site Scripting

Updated under an hour ago (Oct 25, 2026, 9:10 PM ET)

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It affects MyBB Recent threads and 1 other product. 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 Recent threads

Exploited in the last 30 days

MyBB Recent threads 17.0 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts by creating threads with crafted subject lines. Attackers can create threads with script tags in the subject parameter to execute arbitrary JavaScript in the browsers of all users viewing the index page.

CVSS: 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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: Analyzed
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

mybb MyBB Recent threads mybb:recent_threads (from the name)	17.0	CNA record
dragonexpert recent_threads_on_index dragonexpert:recent_threads_on_index	17.0	NVD

References

https://www.exploit-db.com/exploits/44420exploit, vdb-entry
https://community.mybb.com/mods.php?action=view&pid=191product
https://www.vulncheck.com/advisories/mybb-recent-threads-persistent-cross-site-scriptingthird-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.