How severe is CVE-2006-0800?

CVE-2006-0800 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-2006-0800 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-0800?

CVE-2006-0800 primarily affects Postnuke Software Foundation Postnuke. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-0800?

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

When was CVE-2006-0800 published?

CVE-2006-0800 was published on 2006-02-20 and last updated on 2026-06-16.

CVE-2006-0800

CVE-2006-0800 is a low-severity vulnerability in Postnuke Software Foundation Postnuke with a CVSS 2.0 base score of 2.6. 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: Low (CVSS 2.0 base score 2.6)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Postnuke Software Foundation Postnuke
Published: 2006-02-20
Last modified: 2026-06-16

Description

Interpretation conflict in PostNuke 0.761 and earlier allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML tags with a trailing "<" character, which is interpreted as a ">" character by some web browsers but bypasses the blacklist protection in (1) the pnVarCleanFromInput function in pnAPI.php, (2) the pnSecureInput function in pnAntiCracker.php, and (3) the htmltext parameter in an edituser operation to user.php.

Frequently asked questions

What is CVE-2006-0800?: Interpretation conflict in PostNuke 0.761 and earlier allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML tags with a trailing "<" character, which is interpreted as a ">" character by some web browsers but bypasses the blacklist protection in (1) the pnVarCleanFromInput function in pnAPI.php, (2) the pnSecureInput function in pnAntiCracker.php, and (3) the htmltext parameter in an edituser operation to user.php.
How severe is CVE-2006-0800?: CVE-2006-0800 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-2006-0800 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-0800?: CVE-2006-0800 primarily affects Postnuke Software Foundation Postnuke. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-0800?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-0800 published?: CVE-2006-0800 was published on 2006-02-20 and last updated on 2026-06-16.

References

Affected products (19)

cpe:2.3:a:postnuke_software_foundation:postnuke:0.7:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.62:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.63:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.64:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.70:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.71:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.72:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.73:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.74:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.75:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.75_rc3:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.76_rc4:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.76_rc4a:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.76_rc4b:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.703:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.721:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.726.3:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.761:*:*:*:*:*:*:*
cpe:2.3:a:postnuke_software_foundation:postnuke:0.761a:*:*:*:*:*:*:*

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