CVE-2005-4521

CVE-2005-4521 is a medium-severity vulnerability 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

Description

CRLF injection vulnerability in Mantis 1.0.0rc3 and earlier allows remote attackers to modify HTTP headers and conduct HTTP response splitting attacks via (1) the return parameter in login_cookie_test.php and (2) ref parameter in login_select_proj_page.php.

Frequently asked questions

What is CVE-2005-4521?
CRLF injection vulnerability in Mantis 1.0.0rc3 and earlier allows remote attackers to modify HTTP headers and conduct HTTP response splitting attacks via (1) the return parameter in login_cookie_test.php and (2) ref parameter in login_select_proj_page.php.
How severe is CVE-2005-4521?
CVE-2005-4521 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-4521 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2005-4521?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-4521 published?
CVE-2005-4521 was published on 2005-12-28 and last updated on 2026-06-16.

References