CVE-2026-73320

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-09-08. a secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: 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 an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to retrieve private unfurl records by supplying predictable auto-increment primary key IDs to the unfurl endpoint. Attackers can enumerate or predict result IDs and query the endpoint without any session, user, or visibility checks to obtain rendered preview HTML, original URLs, and query strings from private conversations and other restricted content.

CVSS v3
6.1
EG Score
6.1(high)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
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 Unauthenticated Information Disclosure via Unfurl Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/xenforo-unauthenticated-information-disclosure-via-unfurl-endpoint

Vendor Advisories for CVE-2026-73320(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 17× in last 7d / 38× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 18:44 UTCGHSA enrichment
  3. 2026-09-19 19:19 UTCEG score recompute
  4. 2026-09-19 19:19 UTCGHSA enrichment
  5. 2026-09-18 19:45 UTCEG score recompute
  6. 2026-09-18 19:45 UTCGHSA enrichment
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-17 20:19 UTCEG score recompute
  9. 2026-09-17 20:19 UTCGHSA enrichment
  10. 2026-09-16 18:18 UTCEG score recompute
  11. 2026-09-16 18:18 UTCGHSA enrichment
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 18:28 UTCEG score recompute
  15. 2026-09-15 18:28 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 19:03 UTCGHSA enrichment
  18. 2026-09-13 19:38 UTCEG score recompute
  19. 2026-09-13 19:38 UTCGHSA enrichment
  20. 2026-09-12 20:13 UTCEG score recompute
  21. 2026-09-12 20:13 UTCGHSA enrichment
  22. 2026-09-12 15:02 UTCEPSS rescore
  23. 2026-09-11 20:47 UTCEG score recompute
  24. 2026-09-11 20:47 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 13 more
  1. 2026-09-11 00:09 UTCEG score recompute
  2. 2026-09-11 00:09 UTCGHSA enrichment
  3. 2026-09-10 09:35 UTCEPSS rescore
  4. 2026-09-10 00:44 UTCEG score recompute
  5. 2026-09-10 00:43 UTCGHSA enrichment
  6. 2026-09-09 01:18 UTCEG score recompute
  7. 2026-09-09 01:18 UTCGHSA enrichment
  8. 2026-09-08 20:11 UTCEG score recompute
  9. 2026-09-08 20:11 UTCGHSA enrichment
  10. 2026-09-08 14:29 UTCEG score recompute
  11. 2026-09-08 13:47 UTCEG score recompute
  12. 2026-09-08 13:25 UTCEG score recompute
  13. 2026-09-08 13:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73320?
CVE-2026-73320 is a medium vulnerability published on September 8, 2026. XenForo before 2.3.13 contains an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to retrieve private unfurl records by supplying predictable auto-increment primary key IDs to the unfurl endpoint. Attackers can enumerate or predict result IDs and query the…
When was CVE-2026-73320 disclosed?
CVE-2026-73320 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-2026-73320 actively exploited?
CVE-2026-73320 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 83.2% of all scored CVEs.
What is the CVSS score of CVE-2026-73320?
CVE-2026-73320 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-73320?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73320, 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

Explore the affected products and dependency analysis for CVE-2026-73320

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