CVE-2026-51833

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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 — 3 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(medium)
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
34%
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 10× in last 7d / 77× 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.

Showing the most recent 100 of 164 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-08 00:23 UTCEG score recompute
  5. 2026-09-08 00:23 UTCGHSA enrichment
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-06 13:24 UTCGHSA enrichment
  9. 2026-09-05 20:30 UTCEG score recompute
  10. 2026-09-05 20:29 UTCGHSA enrichment
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:12 UTCEPSS rescore
  13. 2026-09-01 13:54 UTCEPSS rescore
  14. 2026-09-01 04:40 UTCEPSS rescore
  15. 2026-08-31 05:36 UTCEG score recompute
  16. 2026-08-31 05:36 UTCGHSA enrichment
  17. 2026-08-30 19:17 UTCEPSS rescore
  18. 2026-08-30 16:31 UTCGHSA enrichment
  19. 2026-08-30 03:27 UTCEG score recompute
  20. 2026-08-30 03:27 UTCGHSA enrichment
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 21:26 UTCEG score recompute
  24. 2026-08-27 21:26 UTCGHSA enrichment
  25. 2026-08-27 14:25 UTCEPSS rescore
Show 75 more
  1. 2026-08-27 05:02 UTCGHSA enrichment
  2. 2026-08-26 14:57 UTCEG score recompute
  3. 2026-08-26 14:57 UTCGHSA enrichment
  4. 2026-08-26 14:46 UTCEPSS rescore
  5. 2026-08-26 01:34 UTCEG score recompute
  6. 2026-08-26 01:34 UTCGHSA enrichment
  7. 2026-08-25 13:49 UTCEPSS rescore
  8. 2026-08-25 12:30 UTCGHSA enrichment
  9. 2026-08-24 23:15 UTCEG score recompute
  10. 2026-08-24 23:15 UTCGHSA enrichment
  11. 2026-08-24 10:10 UTCEG score recompute
  12. 2026-08-24 10:10 UTCGHSA enrichment
  13. 2026-08-23 21:05 UTCGHSA enrichment
  14. 2026-08-23 08:00 UTCEG score recompute
  15. 2026-08-23 08:00 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-22 18:56 UTCGHSA enrichment
  18. 2026-08-22 05:51 UTCEG score recompute
  19. 2026-08-22 05:51 UTCGHSA enrichment
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-21 16:47 UTCGHSA enrichment
  22. 2026-08-21 03:41 UTCEG score recompute
  23. 2026-08-21 03:41 UTCGHSA enrichment
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 14:37 UTCGHSA enrichment
  26. 2026-08-19 23:49 UTCEG score recompute
  27. 2026-08-19 23:49 UTCGHSA enrichment
  28. 2026-08-19 17:04 UTCEPSS rescore
  29. 2026-08-19 09:13 UTCGHSA enrichment
  30. 2026-08-18 19:55 UTCEG score recompute
  31. 2026-08-18 19:55 UTCGHSA enrichment
  32. 2026-08-18 13:48 UTCEPSS rescore
  33. 2026-08-18 04:23 UTCGHSA enrichment
  34. 2026-08-17 15:01 UTCEG score recompute
  35. 2026-08-17 15:01 UTCGHSA enrichment
  36. 2026-08-17 13:47 UTCEPSS rescore
  37. 2026-08-17 01:57 UTCEG score recompute
  38. 2026-08-17 01:57 UTCGHSA enrichment
  39. 2026-08-16 14:56 UTCEPSS rescore
  40. 2026-08-16 12:52 UTCEG score recompute
  41. 2026-08-16 12:52 UTCGHSA enrichment
  42. 2026-08-16 02:14 UTCEPSS rescore
  43. 2026-08-15 23:48 UTCGHSA enrichment
  44. 2026-08-15 10:43 UTCEG score recompute
  45. 2026-08-15 10:43 UTCGHSA enrichment
  46. 2026-08-15 01:30 UTCEPSS rescore
  47. 2026-08-14 21:38 UTCGHSA enrichment
  48. 2026-08-14 08:34 UTCEG score recompute
  49. 2026-08-14 08:34 UTCGHSA enrichment
  50. 2026-08-13 22:00 UTCEPSS rescore
  51. 2026-08-13 19:29 UTCGHSA enrichment
  52. 2026-08-13 06:25 UTCGHSA enrichment
  53. 2026-08-12 17:20 UTCEG score recompute
  54. 2026-08-12 17:20 UTCGHSA enrichment
  55. 2026-08-12 13:51 UTCEPSS rescore
  56. 2026-08-12 04:16 UTCGHSA enrichment
  57. 2026-08-11 15:11 UTCEG score recompute
  58. 2026-08-11 15:11 UTCGHSA enrichment
  59. 2026-08-11 02:07 UTCEG score recompute
  60. 2026-08-11 02:07 UTCGHSA enrichment
  61. 2026-08-11 00:00 UTCEPSS rescore
  62. 2026-08-10 13:03 UTCGHSA enrichment
  63. 2026-08-09 23:59 UTCEG score recompute
  64. 2026-08-09 23:59 UTCGHSA enrichment
  65. 2026-08-09 13:46 UTCEPSS rescore
  66. 2026-08-09 10:55 UTCGHSA enrichment
  67. 2026-08-08 21:50 UTCEG score recompute
  68. 2026-08-08 21:50 UTCGHSA enrichment
  69. 2026-08-08 16:37 UTCEPSS rescore
  70. 2026-08-08 08:45 UTCGHSA enrichment
  71. 2026-08-07 19:41 UTCEG score recompute
  72. 2026-08-07 19:41 UTCGHSA enrichment
  73. 2026-08-07 06:36 UTCGHSA enrichment
  74. 2026-08-06 17:32 UTCEG score recompute
  75. 2026-08-06 17:32 UTCGHSA enrichment

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 65.6% 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

Explore the affected products and dependency analysis for CVE-2026-51833

Explore →

Is Your Infrastructure Affected by CVE-2026-51833?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs