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.

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Fixes

Solution

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Workaround

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History

Thu, 30 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 29 Apr 2026 20:00:00 +0000

Type Values Removed Values Added
Description 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.
Title MyBB Recent threads 17.0 Persistent Cross-Site Scripting
First Time appeared Mybb
Mybb mybb
Weaknesses CWE-79
CPEs cpe:2.3:a:mybb:mybb:17.0:*:*:*:*:*:*:*
Vendors & Products Mybb
Mybb mybb
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-04-30T13:07:56.870Z

Reserved: 2026-04-29T12:18:35.172Z

Link: CVE-2018-25309

cve-icon Vulnrichment

Updated: 2026-04-30T13:07:53.387Z

cve-icon NVD

Status : Received

Published: 2026-04-29T20:16:26.463

Modified: 2026-04-29T20:16:26.463

Link: CVE-2018-25309

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-30T04:00:15Z

Weaknesses