CVE-2021-29399

MEDIUM 6.1CVE-2021-29399 · Published 19/04/2021 · updated 17/06/2026

In short

CVE-2021-29399 is a MEDIUM (CVSS 6.1) vulnerability affecting xmb (xmbforum2).
Chance of exploitation in the next 30 days (EPSS): 0.91%, higher than 60.1% of all vulnerabilities.
Fix: update to 1.9.11.16, 1.9.12.03 or later.

Package	Affected versions	Patched versions
xmb xmbforum2	`≥ 1.9.1, < 1.9.11.16≥ 1.9.11, < 1.9.11.16≥ 1.9.12, < 1.9.12.03`	`1.9.11.161.9.12.03`

Description

XMB is vulnerable to cross-site scripting (XSS) due to inadequate filtering of BBCode input. This bug affects all versions of XMB. All XMB installations must be updated to versions 1.9.12.03 or 1.9.11.16.

References

docs.xmbforum2.com/index.php · Vendor Advisory
forums.xmbforum2.com/viewthread.php · Patch
xmbforum2.com · Vendor Advisory

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