CVE-2018-25309

HIGH 7.2

MyBB Recent threads 17.0 Persistent Cross-Site Scripting

CVSS Score

7.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	mybb
Product	mybb recent threads
Published	Apr 29, 2026
Last Updated	Apr 29, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

None

Affected Versions

mybb / MyBB Recent threads

17.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Perileos