CVE-2026-51833

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Xenforo 2.3.8 is vulnerable to SSRF. Attackers that have administrator privileges or are able to add/save RSS feeds can enumerate internal services (ports) or expose the original IP address of the server.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jul 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

CVE-2026-51833-Public-Disclosure/CVE-2026-51833.md at main · dennywise/CVE-2026-51833-Public-Disclosure · GitHub

https://github.com/dennywise/CVE-2026-51833-Public-Disclosure/blob/main/CVE-2026-51833.md
generic

XenForo - Compelling community forum platform

https://xenforo.com

Vendor Advisories for CVE-2026-51833(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 / 25× 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. 2026-07-26 17:43 UTCEG score recompute
  2. 2026-07-26 17:43 UTCGHSA enrichment
  3. 2026-07-26 14:54 UTCEPSS rescore
  4. 2026-07-26 04:37 UTCEG score recompute
  5. 2026-07-26 04:36 UTCGHSA enrichment
  6. 2026-07-25 14:18 UTCEPSS rescore
  7. 2026-07-24 14:18 UTCEPSS rescore
  8. 2026-07-23 14:18 UTCEPSS rescore
  9. 2026-07-23 03:19 UTCEG score recompute
  10. 2026-07-23 00:23 UTCEG score recompute
  11. 2026-07-23 00:23 UTCGHSA enrichment
  12. 2026-07-22 14:08 UTCEPSS rescore
  13. 2026-07-21 15:25 UTCEPSS rescore
  14. 2026-07-20 18:38 UTCEG score recompute▲ 7.50
  15. 2026-07-20 18:38 UTCGHSA enrichment
  16. 2026-07-20 18:37 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  17. 2026-07-20 17:08 UTCEPSS rescore
  18. 2026-07-19 14:31 UTCEPSS rescore
  19. 2026-07-19 14:31 UTCEPSS rescore
  20. 2026-07-19 02:30 UTCEG score recompute
  21. 2026-07-19 02:30 UTCGHSA enrichment
  22. 2026-07-19 02:29 UTCEPSS rescore
  23. 2026-07-17 22:01 UTCNVD update
  24. 2026-07-17 19:50 UTCEG score recompute
  25. 2026-07-17 19:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-51833?
CVE-2026-51833 is a high vulnerability published on July 17, 2026. Xenforo 2.3.8 is vulnerable to SSRF. Attackers that have administrator privileges or are able to add/save RSS feeds can enumerate internal services (ports) or expose the original IP address of the server.
When was CVE-2026-51833 disclosed?
CVE-2026-51833 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51833 actively exploited?
CVE-2026-51833 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 69.7% of all scored CVEs.
What is the CVSS score of CVE-2026-51833?
CVE-2026-51833 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51833?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51833, 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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