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Not in CISA KEV
HIGH severity

CVE-2017-15806 — mail

HIGH

CVE-2017-15806 is a high-severity (CVSS 8.1) Code Injection vulnerability in zetacomponents/mail. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for zetacomponents/mail — see the affected versions and patch details below.

Zeta Components Mail Arbitrary code execution via a crafted email address

Also known asGHSA-hgr8-g756-vmg9
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 31, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
10.7%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs96th percentile — riskier than 96% of all scored CVEsHighest risk
8.91%12.0%15.1%18.2%16.5%10.7%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘zetacomponents/mail

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

The send function in the ezcMailMtaTransport class in Zeta Components Mail before 1.8.2 does not properly restrict the set of characters used in the ezcMail returnPath property, which might allow remote attackers to execute arbitrary code via a crafted email address, as demonstrated by one containing "-X/path/to/wwwroot/file.php."

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistzetacomponents/mailall versions1.8.2composer require zetacomponents/mail:^1.8.2

Affected Products

1 product · 1 configurations
Application
mailzetacomponents
< 1.8.2
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-43155webappsphp✓ Verified

Zeta Components Mail 1.8.1 - Remote Code Execution

by MalwareBenchmark · Nov 16, 2017

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zetacomponents/mail, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update zetacomponents/mail to 1.8.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-15806 is resolved across your whole dependency graph.

  3. Workarounds

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

The send function in the ezcMailMtaTransport class in Zeta Components Mail before 1.8.2 does not properly restrict the set of characters used in the ezcMail returnPath property, which might allow remote attackers to execute arbitrary code via a crafted email address, as demonstrated by one containing "-X/path/to/wwwroot/file.php."
O3 Security · Impact-Aware SCA

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CVE-2017-15806: mail RCE — Fixed in 1.8.2