How severe is CVE-2004-0004?

CVE-2004-0004 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2004-0004 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-2004-0004?

CVE-2004-0004 affects Openca. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2004-0004?

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-2004-0004 published?

CVE-2004-0004 was published on 2004-02-17 and last updated on 2026-06-16.

CVE-2004-0004

CVE-2004-0004 is a high-severity vulnerability in Openca 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: Openca
Published: 2004-02-17
Last modified: 2026-06-16

Description

The libCheckSignature function in crypto-utils.lib for OpenCA 0.9.1.6 and earlier only compares the serial of the signer's certificate and the one in the database, which can cause OpenCA to incorrectly accept a signature if the certificate's chain is trusted by OpenCA's chain directory, allowing remote attackers to spoof requests from other users.

Frequently asked questions

What is CVE-2004-0004?: The libCheckSignature function in crypto-utils.lib for OpenCA 0.9.1.6 and earlier only compares the serial of the signer's certificate and the one in the database, which can cause OpenCA to incorrectly accept a signature if the certificate's chain is trusted by OpenCA's chain directory, allowing remote attackers to spoof requests from other users.
How severe is CVE-2004-0004?: CVE-2004-0004 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2004-0004 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-2004-0004?: CVE-2004-0004 affects Openca. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2004-0004?: 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-2004-0004 published?: CVE-2004-0004 was published on 2004-02-17 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:openca:openca:*:*:*:*:*:*:*:*

More vulnerabilities in Openca

CVE-2003-0960 — High (CVSS 7.5): OpenCA before 0.9.1.4 does not use the correct certificate in a chain to check the serial, which could cause OpenCA to…
CVE-2004-0787 — Medium (CVSS 4.3): Cross-site scripting (XSS) vulnerability in the web frontend in OpenCA 0.9.1-8 and earlier, and 0.9.2 RC6 and earlier,…

All CVEs affecting Openca →