CVE-2004-0259

CVE-2004-0259 is a critical-severity vulnerability in Joe Lumbroso Acks Formmail.php with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

The check_referer() function in Formmail.php 5.0 and earlier allows remote attackers to bypass access restrictions via an empty or spoofed HTTP Referer, as demonstrated using an application on the same web server that contains a cross-site scripting (XSS) issue.

Frequently asked questions

What is CVE-2004-0259?
The check_referer() function in Formmail.php 5.0 and earlier allows remote attackers to bypass access restrictions via an empty or spoofed HTTP Referer, as demonstrated using an application on the same web server that contains a cross-site scripting (XSS) issue.
How severe is CVE-2004-0259?
CVE-2004-0259 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2004-0259 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-2004-0259?
CVE-2004-0259 primarily affects Joe Lumbroso Acks Formmail.php. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0259?
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-2004-0259 published?
CVE-2004-0259 was published on 2004-11-23 and last updated on 2026-06-16.

References

Affected products (2)