CVE-2026-74239

HIGHPre-NVD 7.27.2—
EchelonGraph scoreHIGH confidence

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-09-08. a secondary CVSS source baseline 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.2Exploit: None knownExposed: 0

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

XenForo before 2.3.13 contains a path traversal vulnerability in the style archive importer on Windows deployments that allows authenticated non-super administrators with style permissions to write arbitrary files outside the intended extraction directory by using backslash-based traversal sequences in ZIP member names. Attackers can craft a malicious ZIP archive with backslash path separators that bypass forward-slash validation to write arbitrary bytes to any web-server-writable path, including the public web root, achieving persistent code execution as the web-server account.

CVSS v3
7.2
EG Score
7.2(high)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity72% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
58%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 11, 2026

Advisory Details (1)

Auto-updated Sep 8, 2026
No patch confirmed yet.
generic

XenForo < 2.3.13 Path Traversal via Style Archive Importer on Windows | Advisories | VulnCheck

https://www.vulncheck.com/advisories/xenforo-path-traversal-via-style-archive-importer-on-windows

Vendor Advisories for CVE-2026-74239(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 69× 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. 2026-09-25 09:49 UTCGHSA enrichment
  2. 2026-09-24 21:52 UTCEG score recompute
  3. 2026-09-24 21:52 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 09:20 UTCGHSA enrichment
  6. 2026-09-23 21:24 UTCEG score recompute
  7. 2026-09-23 21:24 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 09:28 UTCGHSA enrichment
  10. 2026-09-22 21:31 UTCEG score recompute
  11. 2026-09-22 21:31 UTCGHSA enrichment
  12. 2026-09-22 09:34 UTCGHSA enrichment
  13. 2026-09-21 21:38 UTCEG score recompute
  14. 2026-09-21 21:38 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 09:41 UTCGHSA enrichment
  17. 2026-09-20 21:45 UTCEG score recompute
  18. 2026-09-20 21:45 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 09:48 UTCGHSA enrichment
  21. 2026-09-19 21:52 UTCEG score recompute
  22. 2026-09-19 21:52 UTCGHSA enrichment
  23. 2026-09-19 09:54 UTCGHSA enrichment
  24. 2026-09-18 21:21 UTCEG score recompute
  25. 2026-09-18 21:21 UTCGHSA enrichment
Show 44 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 09:07 UTCGHSA enrichment
  3. 2026-09-17 21:11 UTCEG score recompute
  4. 2026-09-17 21:11 UTCGHSA enrichment
  5. 2026-09-17 09:14 UTCGHSA enrichment
  6. 2026-09-16 21:17 UTCEG score recompute
  7. 2026-09-16 21:17 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 08:57 UTCEG score recompute
  10. 2026-09-16 08:57 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 20:51 UTCGHSA enrichment
  13. 2026-09-15 08:25 UTCEG score recompute
  14. 2026-09-15 08:25 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 20:28 UTCGHSA enrichment
  17. 2026-09-14 08:30 UTCGHSA enrichment
  18. 2026-09-13 20:34 UTCEG score recompute
  19. 2026-09-13 20:34 UTCGHSA enrichment
  20. 2026-09-13 08:37 UTCGHSA enrichment
  21. 2026-09-12 20:40 UTCEG score recompute
  22. 2026-09-12 20:40 UTCGHSA enrichment
  23. 2026-09-12 15:02 UTCEPSS rescore
  24. 2026-09-12 08:44 UTCGHSA enrichment
  25. 2026-09-11 20:47 UTCEG score recompute
  26. 2026-09-11 20:47 UTCGHSA enrichment
  27. 2026-09-11 14:53 UTCEPSS rescore
  28. 2026-09-11 13:05 UTCEG score recompute
  29. 2026-09-11 13:05 UTCGHSA enrichment
  30. 2026-09-11 01:08 UTCGHSA enrichment
  31. 2026-09-10 13:10 UTCEG score recompute
  32. 2026-09-10 13:10 UTCGHSA enrichment
  33. 2026-09-10 09:35 UTCEPSS rescore
  34. 2026-09-10 01:13 UTCGHSA enrichment
  35. 2026-09-09 13:17 UTCEG score recompute
  36. 2026-09-09 13:16 UTCGHSA enrichment
  37. 2026-09-09 01:18 UTCEG score recompute
  38. 2026-09-09 01:18 UTCGHSA enrichment
  39. 2026-09-08 20:11 UTCGHSA enrichment
  40. 2026-09-08 15:36 UTCEG score recompute
  41. 2026-09-08 15:35 UTCGHSA enrichment
  42. 2026-09-08 14:29 UTCEG score recompute
  43. 2026-09-08 13:25 UTCEG score recompute
  44. 2026-09-08 13:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74239?
CVE-2026-74239 is a high vulnerability published on September 8, 2026. XenForo before 2.3.13 contains a path traversal vulnerability in the style archive importer on Windows deployments that allows authenticated non-super administrators with style permissions to write arbitrary files outside the intended extraction directory by using backslash-based traversal…
When was CVE-2026-74239 disclosed?
CVE-2026-74239 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74239 actively exploited?
CVE-2026-74239 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 42.5% of all scored CVEs.
What is the CVSS score of CVE-2026-74239?
CVE-2026-74239 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-74239?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74239, 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.

Dependency Blast Radius

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