CVE-2010-1637

The Mail Fetch plugin in SquirrelMail 1.4.20 and earlier allows remote authenticated users to bypass firewall restrictions and use SquirrelMail as a proxy to scan internal networks via a modified POP3 port number.

Published: 2010-06-22 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2010-1637 is rated Moderate Risk (49.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.53%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2010-1637

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-12 0.61% 0.53% -0.09%
2 2025-12-07 0.50% 0.61% +0.11%
3 2025-10-28 — 0.50% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2010-1637

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2010-1637

OS Trackers for CVE-2010-1637

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2010-1637
ubuntu low CVE-2010-1637 low priority: Ubuntu including 1 source packages (squirrelmail), 6 status rows across 6 suites (dapper, hardy, jaunty, karmic, lucid, upstream): released 4, ignored 1, needed 1. https://ubuntu.com/security/CVE-2010-1637

Affected software / configurations for CVE-2010-1637

Vendor Product Version Raw CPE
squirrelmail squirrelmail <= 1.4.20 cpe:2.3:a:squirrelmail:squirrelmail:*:*:*:*:*:*:*:*
fedoraproject fedora 11 cpe:2.3:o:fedoraproject:fedora:11:*:*:*:*:*:*:*
fedoraproject fedora 12 cpe:2.3:o:fedoraproject:fedora:12:*:*:*:*:*:*:*
fedoraproject fedora 13 cpe:2.3:o:fedoraproject:fedora:13:*:*:*:*:*:*:*
apple mac_os_x < 10.6.8 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple mac_os_x_server < 10.6.8 cpe:2.3:o:apple:mac_os_x_server:*:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 5.0 cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 5.0 cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 5.0 cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*

References for CVE-2010-1637

URL Tags
http://conference.hitb.org/hitbsecconf2010dxb/materials/D1%20-%20Laurent%20Oudot%20-%20Improving%20the%20Stealthiness%20of%20Web%20Hacking.pdf#page=69 Broken Link
http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html Mailing List
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/043239.html Mailing List
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/043258.html Mailing List
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/043261.html Mailing List
http://rhn.redhat.com/errata/RHSA-2012-0103.html Third Party Advisory
http://secunia.com/advisories/40307 Broken Link
http://squirrelmail.org/security/issue/2010-06-21 Patch Vendor Advisory
http://squirrelmail.svn.sourceforge.net/viewvc/squirrelmail/branches/SM-1_4-STABLE/squirrelmail/plugins/mail_fetch/functions.php?r1=13951&r2=13950&pathrev=13951 Product
http://squirrelmail.svn.sourceforge.net/viewvc/squirrelmail/branches/SM-1_4-STABLE/squirrelmail/plugins/mail_fetch/options.php?r1=13951&r2=13950&pathrev=13951 Patch
http://support.apple.com/kb/HT5130 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2010:120 Broken Link
http://www.openwall.com/lists/oss-security/2010/05/25/3 Mailing List
http://www.openwall.com/lists/oss-security/2010/05/25/9 Mailing List
http://www.openwall.com/lists/oss-security/2010/06/21/1 Mailing List Patch
http://www.securityfocus.com/bid/40291 Broken Link Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/40307 Broken Link Third Party Advisory VDB Entry
http://www.vupen.com/english/advisories/2010/1535 Broken Link
http://www.vupen.com/english/advisories/2010/1536 Broken Link
http://www.vupen.com/english/advisories/2010/1554 Broken Link
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