How severe is CVE-2009-1777?

CVE-2009-1777 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-1777 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1777?

CVE-2009-1777 affects Matt Wright Formmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-1777?

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

When was CVE-2009-1777 published?

CVE-2009-1777 was published on 2009-05-22 and last updated on 2026-06-16.

CVE-2009-1777

CVE-2009-1777 is a medium-severity vulnerability in Matt Wright Formmail 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. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Matt Wright Formmail
Published: 2009-05-22
Last modified: 2026-06-16

Description

CRLF injection vulnerability in FormMail.pl in Matt Wright FormMail 1.92, and possibly earlier, allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the redirect parameter.

Frequently asked questions

What is CVE-2009-1777?: CRLF injection vulnerability in FormMail.pl in Matt Wright FormMail 1.92, and possibly earlier, allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the redirect parameter.
How severe is CVE-2009-1777?: CVE-2009-1777 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-1777 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1777?: CVE-2009-1777 affects Matt Wright Formmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-1777?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1777 published?: CVE-2009-1777 was published on 2009-05-22 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:matt_wright:formmail:1.92:*:*:*:*:*:*:*

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