How severe is CVE-2008-3966?

CVE-2008-3966 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2008-3966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-3966?

CVE-2008-3966 primarily affects Mybb. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-3966?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-3966 published?

CVE-2008-3966 was published on 2008-09-11 and last updated on 2026-06-16.

CVE-2008-3966

CVE-2008-3966 is a medium-severity vulnerability in Mybb with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mybb
Published: 2008-09-11
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in MyBB (aka MyBulletinBoard) before 1.4.1 allow remote attackers to inject arbitrary web script or HTML via (1) a certain referrer field in usercp2.php, (2) a certain location field in inc/functions_online.php, and certain (3) tsubject and (4) psubject fields in moderation.php.

Frequently asked questions

What is CVE-2008-3966?: Multiple cross-site scripting (XSS) vulnerabilities in MyBB (aka MyBulletinBoard) before 1.4.1 allow remote attackers to inject arbitrary web script or HTML via (1) a certain referrer field in usercp2.php, (2) a certain location field in inc/functions_online.php, and certain (3) tsubject and (4) psubject fields in moderation.php.
How severe is CVE-2008-3966?: CVE-2008-3966 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2008-3966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-3966?: CVE-2008-3966 primarily affects Mybb. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-3966?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-3966 published?: CVE-2008-3966 was published on 2008-09-11 and last updated on 2026-06-16.

References

Affected products (30)

cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.00:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.01:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.6:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.7:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.1.8:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.02:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.6:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.7:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.8:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.9:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.10:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.11:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.12:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.2.13:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.03:*:*:*:*:*:*:*
cpe:2.3:a:mybb:mybb:1.04:*:*:*:*:*:*:*

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