How severe is CVE-2000-0900?

CVE-2000-0900 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2000-0900 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0900?

CVE-2000-0900 primarily affects Acme Labs Thttpd. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2000-0900?

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

When was CVE-2000-0900 published?

CVE-2000-0900 was published on 2000-12-19 and last updated on 2026-06-16.

CVE-2000-0900

CVE-2000-0900 is a high-severity vulnerability in Acme Labs Thttpd with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Acme Labs Thttpd
Published: 2000-12-19
Last modified: 2026-06-16

Description

Directory traversal vulnerability in ssi CGI program in thttpd 2.19 and earlier allows remote attackers to read arbitrary files via a "%2e%2e" string, a variation of the .. (dot dot) attack.

Frequently asked questions

What is CVE-2000-0900?: Directory traversal vulnerability in ssi CGI program in thttpd 2.19 and earlier allows remote attackers to read arbitrary files via a "%2e%2e" string, a variation of the .. (dot dot) attack.
How severe is CVE-2000-0900?: CVE-2000-0900 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2000-0900 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0900?: CVE-2000-0900 primarily affects Acme Labs Thttpd. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2000-0900?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2000-0900 published?: CVE-2000-0900 was published on 2000-12-19 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:acme_labs:thttpd:2.16:*:*:*:*:*:*:*
cpe:2.3:a:acme_labs:thttpd:2.17:*:*:*:*:*:*:*
cpe:2.3:a:acme_labs:thttpd:2.18:*:*:*:*:*:*:*
cpe:2.3:a:acme_labs:thttpd:2.19:*:*:*:*:*:*:*

More vulnerabilities in Acme Labs Thttpd

CVE-2000-0359 — Critical (CVSS 10.0): Buffer overflow in Trivial HTTP (THTTPd) allows remote attackers to cause a denial of service or execute arbitrary…
CVE-2006-1078 — High (CVSS 8.4): Multiple buffer overflows in htpasswd, as used in Acme thttpd 2.25b, and possibly other products such as Apache, might…
CVE-2002-0733 — High (CVSS 7.5): Cross-site scripting vulnerability in thttpd 2.20 and earlier allows remote attackers to execute arbitrary script via a…
CVE-2006-4248 — High (CVSS 7.2): thttpd on Debian GNU/Linux, and possibly other distributions, allows local users to create or touch arbitrary files via…
CVE-2006-1079 — High (CVSS 7.2): htpasswd, as used in Acme thttpd 2.25b and possibly other products such as Apache, might allow local users to gain…
CVE-2007-0664 — Medium (CVSS 5.0): thttpd before 2.25b-r6 in Gentoo Linux is started from the system root directory (/) by the Gentoo baselayout 1.12.6…

All CVEs affecting Acme Labs Thttpd →