CVE-2015-1503: Multiple directory traversal vulnerabilities in IceWarp Mail Server before 11.2 allow remote attackers to read

Q: How do I fix CVE-2015-1503?

mail server: upgrade to 11.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2015-1503 being exploited?

CVE-2015-1503 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-1503 affect?

CVE-2015-1503 affects mail server. Severity is high (CVSS 7.5). Multiple directory traversal vulnerabilities in IceWarp Mail Server before 11.2 allow remote attackers to read arbitrary files via a (1) .. (dot dot) in the file parameter to a webmail/client/skins/default/css/css.php page or .../. (dot dot

Q: How urgent is CVE-2015-1503?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2015-1503 is a high-severity flaw (CVSS 7.5) affecting mail server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple directory traversal vulnerabilities in IceWarp Mail Server before 11.2 allow remote attackers to read arbitrary files via a (1) .. (dot dot) in the file parameter to a webmail/client/skins/default/css/css.php page or .../. (dot dot dot slash dot) in the (2) script or (3) style parameter to webmail/old/calendar/minimizer/index.php.

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	57.0% (top 1%)
CISA exploited list	No
Weakness	CWE-22
Published	2018-05-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: icewarp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-05-08 20:29 UTCPublished CVE record published
2026-06-17 00:22 UTCUpdated Record last modified

icewarp mail server UPGRADE

Affected: < 11.2.0

Fixed in: 11.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mail-server || rpm -q mail-server || mail-server --version

2. UPGRADE to 11.2.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mail-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mail-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: IceWarp Mail Server < 11.1.1 - Directory Traversal
Nuclei scan template: IceWarp Mail Server <11.1.1 - Directory Traversal

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-1503?

mail server: upgrade to 11.2.0. Exact commands for each OS are on this page.

Is CVE-2015-1503 being exploited?

CVE-2015-1503 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-1503 affect?

CVE-2015-1503 affects mail server. Severity is high (CVSS 7.5). Multiple directory traversal vulnerabilities in IceWarp Mail Server before 11.2 allow remote attackers to read arbitrary files via a (1) .. (dot dot) in the file parameter to a webmail/client/skins/default/css/css.php page or .../. (dot dot

How urgent is CVE-2015-1503?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

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References

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