How severe is CVE-2000-0623?

CVE-2000-0623 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2000-0623 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0623?

CVE-2000-0623 primarily affects Oreilly Website Professional. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2000-0623?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2000-0623 published?

CVE-2000-0623 was published on 2000-07-17 and last updated on 2026-06-16.

CVE-2000-0623

CVE-2000-0623 is a critical-severity vulnerability in Oreilly Website Professional with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Oreilly Website Professional
Published: 2000-07-17
Last modified: 2026-06-16

Description

Buffer overflow in O'Reilly WebSite Professional web server 2.4 and earlier allows remote attackers to execute arbitrary commands via a long GET request or Referrer header.

Frequently asked questions

What is CVE-2000-0623?: Buffer overflow in O'Reilly WebSite Professional web server 2.4 and earlier allows remote attackers to execute arbitrary commands via a long GET request or Referrer header.
How severe is CVE-2000-0623?: CVE-2000-0623 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2000-0623 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0623?: CVE-2000-0623 primarily affects Oreilly Website Professional. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2000-0623?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2000-0623 published?: CVE-2000-0623 was published on 2000-07-17 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:oreilly:website_professional:2.3.18:*:*:*:*:*:*:*
cpe:2.3:a:oreilly:website_professional:2.4:*:*:*:*:*:*:*
cpe:2.3:a:oreilly:website_professional:2.4.9:*:*:*:*:*:*:*

More vulnerabilities in Oreilly Website Professional

CVE-2000-0622 — Critical (CVSS 10.0): Buffer overflow in Webfind CGI program in O'Reilly WebSite Professional web server 2.x allows remote attackers to…
CVE-2001-0626 — High (CVSS 7.5): O'Reilly Website Professional 2.5.4 and earlier allows remote attackers to determine the physical path to the root…
CVE-2000-0066 — Medium (CVSS 5.0): WebSite Pro allows remote attackers to determine the real pathname of webdirectories via a malformed URL request.

All CVEs affecting Oreilly Website Professional →