CVE-2017-15806

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 16.5%, top 5% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 11%CVSS: 8.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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."

CVSS v3
8.1
EG Score
8.1(medium)
EPSS
95.3%
KEV
Not listed

Published

November 15, 2017

Last Modified

May 13, 2026

References (12)

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
zetacomponents/mail1.1 ... 1.8beta1 (41 versions)1.8.2—

Data Freshness Timeline

(refreshed 8× in last 7d / 29× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-05 02:27 UTCEPSS rescore
  4. 2026-07-04 06:28 UTCEPSS rescore
  5. 2026-07-01 15:02 UTCEPSS rescore
  6. 2026-07-01 15:02 UTCEPSS rescore
  7. 2026-06-30 23:19 UTCEPSS rescore
  8. 2026-06-30 23:19 UTCEPSS rescore
  9. 2026-06-28 04:53 UTCEPSS rescore
  10. 2026-06-27 03:05 UTCEPSS rescore
  11. 2026-06-25 13:47 UTCEPSS rescore
  12. 2026-06-25 13:47 UTCEPSS rescore
  13. 2026-06-24 14:02 UTCEPSS rescore
  14. 2026-06-23 21:30 UTCEPSS rescore
  15. 2026-06-22 21:35 UTCOSV refresh
  16. 2026-06-22 14:23 UTCEPSS rescore
  17. 2026-06-22 14:23 UTCEPSS rescore
  18. 2026-06-21 01:57 UTCEPSS rescore
  19. 2026-06-21 01:57 UTCEPSS rescore
  20. 2026-06-18 17:50 UTCEPSS rescore
  21. 2026-06-17 17:50 UTCEPSS rescore
  22. 2026-06-16 17:50 UTCEPSS rescore
  23. 2026-06-15 17:45 UTCEPSS rescore
  24. 2026-06-14 23:14 UTCEPSS rescore
  25. 2026-06-14 23:14 UTCEPSS rescore
Show 41 more
  1. 2026-06-13 22:57 UTCEPSS rescore
  2. 2026-06-12 23:09 UTCEPSS rescore
  3. 2026-06-11 13:57 UTCEPSS rescore
  4. 2026-06-10 22:15 UTCEPSS rescore
  5. 2026-06-07 15:22 UTCEPSS rescore
  6. 2026-06-07 15:22 UTCEPSS rescore
  7. 2026-06-06 13:45 UTCEPSS rescore
  8. 2026-06-06 13:45 UTCEPSS rescore
  9. 2026-06-05 22:44 UTCEPSS rescore
  10. 2026-06-05 13:27 UTCOSV refresh
  11. 2026-06-05 06:08 UTCEPSS rescore
  12. 2026-06-05 06:08 UTCEPSS rescore
  13. 2026-06-04 13:10 UTCEPSS rescore
  14. 2026-06-04 13:10 UTCEPSS rescore
  15. 2026-06-02 20:11 UTCEPSS rescore
  16. 2026-06-02 20:11 UTCEPSS rescore
  17. 2026-06-01 13:49 UTCEPSS rescore
  18. 2026-06-01 13:49 UTCEPSS rescore
  19. 2026-05-31 22:28 UTCEPSS rescore
  20. 2026-05-31 00:14 UTCEPSS rescore
  21. 2026-05-29 13:41 UTCEPSS rescore
  22. 2026-05-28 13:42 UTCEPSS rescore
  23. 2026-05-28 13:42 UTCEPSS rescore
  24. 2026-05-27 13:38 UTCEPSS rescore
  25. 2026-05-27 13:38 UTCEPSS rescore
  26. 2026-05-26 13:42 UTCEPSS rescore
  27. 2026-05-26 13:42 UTCEPSS rescore
  28. 2026-05-26 07:17 UTCEPSS rescore
  29. 2026-05-26 07:17 UTCEPSS rescore
  30. 2026-05-23 00:10 UTCEG score recompute
  31. 2026-05-22 21:15 UTCEPSS rescore
  32. 2026-05-22 21:15 UTCEPSS rescore
  33. 2026-05-22 21:15 UTCEPSS rescore
  34. 2026-05-22 08:02 UTCEG score recompute
  35. 2026-05-22 07:36 UTCOSV refresh
  36. 2026-05-20 22:37 UTCEPSS rescore
  37. 2026-05-20 22:37 UTCEPSS rescore
  38. 2026-05-20 11:21 UTCEPSS rescore
  39. 2026-05-20 11:21 UTCEPSS rescore
  40. 2026-05-18 21:30 UTCEPSS rescore
  41. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-43155✓ verified
    First seen Nov 16, 2017

    Zeta Components Mail 1.8.1 - Remote Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2017-15806?
CVE-2017-15806 is a high vulnerability published on November 15, 2017. 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…
When was CVE-2017-15806 disclosed?
CVE-2017-15806 was first published in the National Vulnerability Database on November 15, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-15806 actively exploited?
CVE-2017-15806 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-15806?
CVE-2017-15806 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2017-15806?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-15806, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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