How severe is CVE-2011-1492?

CVE-2011-1492 has a CVSS 2.0 base score of 5.5, rated medium severity.

Is CVE-2011-1492 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1492?

CVE-2011-1492 primarily affects Roundcube Webmail. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1492?

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

When was CVE-2011-1492 published?

CVE-2011-1492 was published on 2011-04-08 and last updated on 2026-06-16.

CVE-2011-1492

CVE-2011-1492 is a medium-severity vulnerability in Roundcube Webmail with a CVSS 2.0 base score of 5.5. 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 5.5)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Roundcube Webmail
Published: 2011-04-08
Last modified: 2026-06-16

Description

steps/utils/modcss.inc in Roundcube Webmail before 0.5.1 does not properly verify that a request is an expected request for an external Cascading Style Sheets (CSS) stylesheet, which allows remote authenticated users to trigger arbitrary outbound TCP connections from the server, and possibly obtain sensitive information, via a crafted request.

Frequently asked questions

What is CVE-2011-1492?: steps/utils/modcss.inc in Roundcube Webmail before 0.5.1 does not properly verify that a request is an expected request for an external Cascading Style Sheets (CSS) stylesheet, which allows remote authenticated users to trigger arbitrary outbound TCP connections from the server, and possibly obtain sensitive information, via a crafted request.
How severe is CVE-2011-1492?: CVE-2011-1492 has a CVSS 2.0 base score of 5.5, rated medium severity.
Is CVE-2011-1492 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1492?: CVE-2011-1492 primarily affects Roundcube Webmail. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1492?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1492 published?: CVE-2011-1492 was published on 2011-04-08 and last updated on 2026-06-16.

References

Affected products (22)

cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.1:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.1:alpha:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.1:beta:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.1:beta2:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.1:rc1:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.1:rc2:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.2:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.2:alpha:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.2:beta:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.2.1:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.3:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.3:beta:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.3:rc1:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.3.1:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.4:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.4:beta:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.4.1:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.4.2:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.5:beta:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:0.5:rc:*:*:*:*:*:*

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