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CVE-2010-0463

19
FAUCET Score

CVE-2010-0463 affects Horde IMP 4.3.6 and earlier, where the webmail client fails to prevent web browsers from performing DNS prefetching of domain names found in email messages. This oversight allows remote attackers to potentially discover the network location of a webmail user by monitoring DNS requests. The vulnerability has a CVSS score of 5.0, indicating a medium severity, with low attack complexity and no authentication required, leading to a potential information disclosure impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.3.6CPE matchmatch criteria
cpe:2.3:a:horde:imp:*:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:horde:imp:2.0:*:*:*:*:*:*:*
2.2CPE matchmatch criteria
cpe:2.3:a:horde:imp:2.2:*:*:*:*:*:*:*
2.2.1CPE matchmatch criteria
cpe:2.3:a:horde:imp:2.2.1:*:*:*:*:*:*:*
2.2.2CPE matchmatch criteria
cpe:2.3:a:horde:imp:2.2.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.94%
Probability of exploitation in next 30 days
EPSS Percentile
78.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0194 is in the 66th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2010-0463Moderate

imp: privacy compromise via DNS prefetching in web mail

Jan 23, 2010

References

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