CVE-2016-10073

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 84% probability of exploitation within the next 30 days (top 0.3% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 84%
  • Public exploit code is available (Metasploit, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 84%CVSS: 7.5Exploit: Metasploit · epss top5pct · epss high · public exploitExposed: 0

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

The from method in library/core/class.email.php in Vanilla Forums before 2.3.1 allows remote attackers to spoof the email domain in sent messages and potentially obtain sensitive information via a crafted HTTP Host header, as demonstrated by a password reset request.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
78(Track)
EG Risk 78/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation84% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
84%
EPSS %ILE
100%
KEV
Not listed

Published

May 23, 2017

Last Modified

June 17, 2026

References (8)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 7× 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. 2026-09-19 15:35 UTCEPSS rescore
  2. 2026-09-18 19:22 UTCEPSS rescore
  3. 2026-09-17 19:21 UTCEPSS rescore
  4. 2026-09-10 09:26 UTCEPSS rescore
  5. 2026-09-06 13:42 UTCEPSS rescore
  6. 2026-09-04 13:55 UTCEPSS rescore
  7. 2026-09-02 14:07 UTCEPSS rescore
  8. 2026-08-26 14:41 UTCEPSS rescore
  9. 2026-08-25 13:44 UTCEPSS rescore
  10. 2026-08-23 00:13 UTCEPSS rescore
  11. 2026-08-20 22:50 UTCEPSS rescore
  12. 2026-08-18 13:43 UTCEPSS rescore
  13. 2026-08-15 01:25 UTCEPSS rescore
  14. 2026-08-12 13:46 UTCEPSS rescore
  15. 2026-08-07 16:22 UTCEPSS rescore
  16. 2026-08-04 15:04 UTCEPSS rescore
  17. 2026-07-30 01:26 UTCEPSS rescore
  18. 2026-07-30 01:26 UTCEPSS rescore
  19. 2026-07-26 14:50 UTCEPSS rescore
  20. 2026-07-24 14:13 UTCEPSS rescore
  21. 2026-07-23 01:21 UTCEG score recompute
  22. 2026-07-23 00:22 UTCEG score recompute▲ 1.50
  23. 2026-07-22 22:00 UTCEG score recompute
  24. 2026-07-22 14:04 UTCEPSS rescore
  25. 2026-07-21 15:21 UTCEPSS rescore
Show 53 more
  1. 2026-07-21 15:21 UTCEPSS rescore
  2. 2026-07-19 02:26 UTCEPSS rescore
  3. 2026-07-19 02:26 UTCEPSS rescore
  4. 2026-07-15 16:54 UTCEPSS rescore
  5. 2026-07-15 16:54 UTCEPSS rescore
  6. 2026-07-09 19:05 UTCEPSS rescore
  7. 2026-07-09 19:05 UTCEPSS rescore
  8. 2026-07-04 06:28 UTCEPSS rescore
  9. 2026-06-28 14:04 UTCEPSS rescore
  10. 2026-06-27 03:05 UTCEPSS rescore
  11. 2026-06-24 14:02 UTCEPSS rescore
  12. 2026-06-24 14:02 UTCEPSS rescore
  13. 2026-06-23 21:30 UTCEPSS rescore
  14. 2026-06-21 14:54 UTCEPSS rescore
  15. 2026-06-21 14:54 UTCEPSS rescore
  16. 2026-06-21 01:57 UTCEPSS rescore
  17. 2026-06-21 01:57 UTCEPSS rescore
  18. 2026-06-16 17:50 UTCEPSS rescore
  19. 2026-06-16 17:50 UTCEPSS rescore
  20. 2026-06-15 17:45 UTCEPSS rescore
  21. 2026-06-14 23:14 UTCEPSS rescore
  22. 2026-06-12 23:09 UTCEPSS rescore
  23. 2026-06-12 23:09 UTCEPSS rescore
  24. 2026-06-10 22:15 UTCEPSS rescore
  25. 2026-06-08 14:14 UTCEPSS rescore
  26. 2026-06-06 13:45 UTCEPSS rescore
  27. 2026-06-05 22:44 UTCEPSS rescore
  28. 2026-06-05 06:08 UTCEPSS rescore
  29. 2026-06-05 06:08 UTCEPSS rescore
  30. 2026-06-04 13:10 UTCEPSS rescore
  31. 2026-06-04 13:10 UTCEPSS rescore
  32. 2026-06-02 20:10 UTCEPSS rescore
  33. 2026-05-31 22:28 UTCEPSS rescore
  34. 2026-05-31 22:28 UTCEPSS rescore
  35. 2026-05-31 00:14 UTCEPSS rescore
  36. 2026-05-29 13:41 UTCEPSS rescore
  37. 2026-05-28 13:42 UTCEPSS rescore
  38. 2026-05-28 13:42 UTCEPSS rescore
  39. 2026-05-27 13:38 UTCEPSS rescore
  40. 2026-05-27 13:38 UTCEPSS rescore
  41. 2026-05-26 13:41 UTCEPSS rescore
  42. 2026-05-22 21:15 UTCEPSS rescore
  43. 2026-05-22 13:07 UTCEG score recompute
  44. 2026-05-22 13:07 UTCGHSA enrichment
  45. 2026-05-21 22:40 UTCEPSS rescore
  46. 2026-05-20 22:37 UTCEPSS rescore
  47. 2026-05-20 22:37 UTCEPSS rescore
  48. 2026-05-20 11:21 UTCEPSS rescore
  49. 2026-05-20 11:21 UTCEPSS rescore
  50. 2026-05-20 11:21 UTCEPSS rescore
  51. 2026-05-19 21:03 UTCOSV refresh
  52. 2026-05-18 21:30 UTCEPSS rescore
  53. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-41996
    First seen May 11, 2017

    Vanilla Forums < 2.3 - Remote Code Execution

    Open source ↗
  • Metasploitauxiliary/scanner/http/host_header_injection✓ verified
    First seen Jan 1, 2016

    HTTP Host Header Injection Detection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2016-10073?
CVE-2016-10073 is a critical vulnerability published on May 23, 2017. The from method in library/core/class.email.php in Vanilla Forums before 2.3.1 allows remote attackers to spoof the email domain in sent messages and potentially obtain sensitive information via a crafted HTTP Host header, as demonstrated by a password reset request.
When was CVE-2016-10073 disclosed?
CVE-2016-10073 was first published in the National Vulnerability Database on May 23, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-10073 actively exploited?
CVE-2016-10073 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84% probability of exploitation in the next 30 days, which ranks it in the top 0.3% of all scored CVEs.
What is the CVSS score of CVE-2016-10073?
CVE-2016-10073 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2016-10073?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-10073, 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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