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Vulnerability record · CVE-2010-0463 · published 29 January 2010

CVE-2010-0463: Horde imp information exposure vulnerability

Horde · Imp

Horde IMP 4.3.6 and earlier does not request that the web browser avoid DNS prefetching of domain names contained in e-mail messages, which makes it easier for remote attackers to determine the network location of the webmail user by logging DNS requests.

5.0 CVSS 2.0 Medium EPSS 2.0% · top 20.3% CWE-200 · Information exposure
5.0CVSS 2.0 base score
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

Horde IMP 4.3.6 and earlier does not request that the web browser avoid DNS prefetching of domain names contained in e-mail messages, which makes it easier for remote attackers to determine the network location of the webmail user by logging DNS requests.

AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bugs.horde.org/ticket/8836 Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/56052
https://secure.grepular.com/DNS_Prefetch_Exposure_on_Thunderbird_and_Webmail
http://bugs.horde.org/ticket/8836 Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/56052
https://secure.grepular.com/DNS_Prefetch_Exposure_on_Thunderbird_and_Webmail

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2010-0463), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.