Is CVE-2009-1312 in the CISA KEV catalog?

No. CVE-2009-1312 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-1312?

CVE-2009-1312 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2009-1312?

CVE-2009-1312 has an EPSS score of 5.56% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2009-1312?

No published fix for CVE-2009-1312 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2009-1312

MEDIUMEPSS 92th pctl

4.3

CVSS v2

NVD

Description

Mozilla Firefox before 3.0.9 and SeaMonkey 1.1.17 do not block javascript: URIs in Refresh headers in HTTP responses, which allows remote attackers to conduct cross-site scripting (XSS) attacks via vectors related to (1) injecting a Refresh header or (2) specifying the content of a Refresh header. NOTE: it was later reported that Firefox 3.6 a1 pre and Mozilla 1.7.x and earlier are also affected.

CWE-16

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

5.56%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.