PT-2021-10278 · Mybb · Mybb

Joelister · Published 2021-08-31 · Updated 2024-03-06 · CVE-2020-19049

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: MyBB version 1.8.20

Description: The issue allows remote attackers to inject arbitrary web script or HTML via the Description field in the Add New Forum page. This can be achieved by doing an authenticated POST HTTP request to "/Upload/admin/index.php?module=forum-management&action=add".

Recommendations: For MyBB version 1.8.20, as a temporary workaround, consider restricting access to the "Add New Forum" page and the /Upload/admin/index.php?module=forum-management&action=add endpoint until a patch is available. Avoid using the Description field in the affected page until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BIT-MYBB-2020-19049

CVE-2020-19049

Affected Products

Mybb

References · 5

• 🔥 https://github.com/joelister/bug/issues/2 · Exploit
• https://osv.dev/vulnerability/CVE-2020-19049 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-19049 · Security Note
• https://osv.dev/vulnerability/BIT-mybb-2020-19049 · Vendor Advisory
• https://t.me/cibsecurity/28087 · Telegram Post