How severe is CVE-2007-6321?

CVE-2007-6321 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2007-6321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-6321?

CVE-2007-6321 affects Roundcube Webmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-6321?

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

When was CVE-2007-6321 published?

CVE-2007-6321 was published on 2007-12-12 and last updated on 2026-06-16.

CVE-2007-6321

CVE-2007-6321 is a medium-severity vulnerability in Roundcube Webmail 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. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Roundcube Webmail
Published: 2007-12-12
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in RoundCube webmail 0.1rc2, 2007-12-09, and earlier versions, when using Internet Explorer, allows remote attackers to inject arbitrary web script or HTML via style sheets containing expression commands.

Frequently asked questions

What is CVE-2007-6321?: Cross-site scripting (XSS) vulnerability in RoundCube webmail 0.1rc2, 2007-12-09, and earlier versions, when using Internet Explorer, allows remote attackers to inject arbitrary web script or HTML via style sheets containing expression commands.
How severe is CVE-2007-6321?: CVE-2007-6321 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2007-6321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-6321?: CVE-2007-6321 affects Roundcube Webmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-6321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-6321 published?: CVE-2007-6321 was published on 2007-12-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:roundcube:webmail:*:rc2:*:*:*:*:*:*

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