CVE-2018-8741

A directory traversal flaw in SquirrelMail 1.4.22 allows an authenticated attacker to exfiltrate ...

8.8 HighFix available

A directory traversal flaw in SquirrelMail 1.4.22 allows an authenticated attacker to exfiltrate (or potentially delete) files from the hosting server, related to ../ in the att_local_name field in Deliver.class.php.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

4.21%Up 2.1 points since Apr 14, 2021

What each source reports

NVD Score used 8.8

Record: CVE-2018-8741
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness: CWE-22
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-8741
Updated: 2026-11-02

EUVDEUVD-2018-20351 No score

Record: EUVD-2018-20351
Updated: 2026-11-03

GitHub AdvisoriesGHSA-vqm2-8vc9-6hh2 8.8

A directory traversal flaw in SquirrelMail 1.4.22 allows an authenticated attacker to exfiltrate ...

Record: GHSA-vqm2-8vc9-6hh2
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-22
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-8741 8.8

Record: UBUNTU-CVE-2018-8741
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVMGASA-2018-0188 No score

Updated squirrelmail packages fix CVE-2018-8741

Updated squirrelmail packages fix security vulnerabilities: Filenames of attachment files are not sanitized, so attackers could read arbitrary files. (CVE-2018-8741)

Record: MGASA-2018-0188
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`squirrelmail` Debian:7	before 2:1.4.23~svn20120406-2+deb7u2, plus listed versions 2:1.4.23~svn20120406-22:1.4.23~svn20120406-2+deb7u1	2:1.4.23~svn20120406-2+deb7u2
`squirrelmail` Debian:8	before 2:1.4.23~svn20120406-2+deb8u2, plus listed versions 2:1.4.23~svn20120406-22:1.4.23~svn20120406-2+deb8u1	2:1.4.23~svn20120406-2+deb8u2
`squirrelmail` Mageia:5	before 1.4.22-12.3.mga5	1.4.22-12.3.mga5
`squirrelmail` Mageia:6	before 1.4.22-15.1.mga6	1.4.22-15.1.mga6
`squirrelmail` Ubuntu:16.04:LTS	before 2:1.4.23~svn20120406-2+deb8u3ubuntu0.16.04.1, plus listed versions 2:1.4.23~svn20120406-22:1.4.23~svn20120406-2ubuntu12:1.4.23~svn20120406-2ubuntu1.16.04.12:1.4.23~svn20120406-2+deb8u1ubuntu0.16.04.12:1.4.23~svn20120406-2+deb8u2build0.16.04.12:1.4.23~svn20120406-2+deb8u2ubuntu0.16.04.22:1.4.23~svn20120406-2+deb8u2ubuntu0.16.04.3	2:1.4.23~svn20120406-2+deb8u3ubuntu0.16.04.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-8741 is a high vulnerability (CVSS 8.8) in Squirrelmail, published March 17, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.21%, the 91st percentile. Fixed in squirrelmail 2:1.4.23~svn20120406-2+deb7u2.

References

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