How severe is CVE-2001-1534?

CVE-2001-1534 has a CVSS 2.0 base score of 2.1, rated low severity.

Is CVE-2001-1534 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1534?

CVE-2001-1534 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-1534?

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

When was CVE-2001-1534 published?

CVE-2001-1534 was published on 2001-12-31 and last updated on 2026-06-16.

CVE-2001-1534

CVE-2001-1534 is a low-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 2.1. 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-384.

Key facts

Severity: Low (CVSS 2.0 base score 2.1)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Apache Http Server
Published: 2001-12-31
Last modified: 2026-06-16

Description

mod_usertrack in Apache 1.3.11 through 1.3.20 generates session ID's using predictable information including host IP address, system time and server process ID, which allows local users to obtain session ID's and bypass authentication when these session ID's are used for authentication.

Frequently asked questions

What is CVE-2001-1534?: mod_usertrack in Apache 1.3.11 through 1.3.20 generates session ID's using predictable information including host IP address, system time and server process ID, which allows local users to obtain session ID's and bypass authentication when these session ID's are used for authentication.
How severe is CVE-2001-1534?: CVE-2001-1534 has a CVSS 2.0 base score of 2.1, rated low severity.
Is CVE-2001-1534 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1534?: CVE-2001-1534 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-1534?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-1534 published?: CVE-2001-1534 was published on 2001-12-31 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

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