How severe is CVE-2004-0263?

CVE-2004-0263 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2004-0263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0263?

CVE-2004-0263 primarily affects Apache Http Server. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0263?

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

When was CVE-2004-0263 published?

CVE-2004-0263 was published on 2004-11-23 and last updated on 2026-06-16.

CVE-2004-0263

CVE-2004-0263 is a medium-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apache Http Server
Published: 2004-11-23
Last modified: 2026-06-16

Description

PHP 4.3.4 and earlier in Apache 1.x and 2.x (mod_php) can leak global variables between virtual hosts that are handled by the same Apache child process but have different settings, which could allow remote attackers to obtain sensitive information.

Frequently asked questions

What is CVE-2004-0263?: PHP 4.3.4 and earlier in Apache 1.x and 2.x (mod_php) can leak global variables between virtual hosts that are handled by the same Apache child process but have different settings, which could allow remote attackers to obtain sensitive information.
How severe is CVE-2004-0263?: CVE-2004-0263 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2004-0263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0263?: CVE-2004-0263 primarily affects Apache Http Server. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0263?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-0263 published?: CVE-2004-0263 was published on 2004-11-23 and last updated on 2026-06-16.

References

Affected products (50)

cpe:2.3:a:apache:http_server:1.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.7:*:dev:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.11:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.12:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.14:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.17:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.18:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.19:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.20:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.22:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.23:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.24:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.25:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.26:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.27:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.28:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:1.3.29:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.28:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.28:beta:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.32:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.35:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.36:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.37:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.38:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.0.39:*:*:*:*:*:*:*

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All CVEs affecting Apache Http Server →

Threat intelligence

Threat-intel indicators referencing this CVE:

90.160.135.217 (ipv4-addr)
62.36.19.42 (ipv4-addr)
62.36.19.41 (ipv4-addr)