Is CVE-2021-29399 in the CISA KEV catalog?

No. CVE-2021-29399 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-29399?

CVE-2021-29399 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2021-29399?

CVE-2021-29399 has an EPSS score of 0.82% (53th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-29399?

Upgrade xmb to 1.9.12.03 or later.

CVE & CISA-KEV Catalog

CVE-2021-29399

MEDIUM

6.1

CVSS v3

NVD

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.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

xmbNVD

Affected:>= 1.9.12, < 1.9.12.03Fixed in:1.9.12.03CVE-2021-29399derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.82%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Patch1

forums.xmbforum2.com

Vendor Advisory2

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

Embed a live status badge for CVE-2021-29399

Markdown

[![CVE-2021-29399](https://tridentstack.com/cve/badge/CVE-2021-29399.svg)](https://tridentstack.com/cve/CVE-2021-29399)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-29399"><img src="https://tridentstack.com/cve/badge/CVE-2021-29399.svg" alt="CVE-2021-29399"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.