How severe is CVE-2007-1991?

CVE-2007-1991 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2007-1991 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-1991?

CVE-2007-1991 affects Youngzsoft Cmailserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-1991?

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

When was CVE-2007-1991 published?

CVE-2007-1991 was published on 2007-04-12 and last updated on 2026-06-16.

CVE-2007-1991

CVE-2007-1991 is a medium-severity vulnerability in Youngzsoft Cmailserver with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Youngzsoft Cmailserver
Published: 2007-04-12
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in mail/signup.asp in CmailServer WebMail 5.4.3, and possibly earlier, allows remote attackers to inject arbitrary web script or HTML via the Comment parameter, a different vector than CVE-2007-1927.

Frequently asked questions

What is CVE-2007-1991?: Cross-site scripting (XSS) vulnerability in mail/signup.asp in CmailServer WebMail 5.4.3, and possibly earlier, allows remote attackers to inject arbitrary web script or HTML via the Comment parameter, a different vector than CVE-2007-1927.
How severe is CVE-2007-1991?: CVE-2007-1991 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2007-1991 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-1991?: CVE-2007-1991 affects Youngzsoft Cmailserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-1991?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-1991 published?: CVE-2007-1991 was published on 2007-04-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:youngzsoft:cmailserver:*:*:*:*:*:*:*:*

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