CVE-2025-53102

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 63% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

Discourse is an open-source community discussion platform. Prior to version 3.4.7 on the stable branch and version 3.5.0.beta.8 on the tests-passed branch, upon issuing a physical security key for 2FA, the server generates a WebAuthn challenge, which the client signs. The challenge is not cleared from the user’s session after authentication, potentially allowing reuse and increasing security risk. This is fixed in versions 3.4.7 and 3.5.0.beta.8.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
36.8%
KEV
Not listed

Published

July 29, 2025

Last Modified

August 25, 2025

Advisory Details (3)

Auto-updated Jun 12, 2026
Patch available. Sources: github_commit, github.
github Patch Available

WebAuthn challenge not cleared from user's session after authentication · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-hv49-93h5-4wcv
github_commit

commit 8bc0cee2c00a (discourse/discourse)

Fix landed in discourse/discourse commit 8bc0cee2c00a — awaiting tagged release

https://github.com/discourse/discourse/commit/8bc0cee2c00a514ea60f33ea6172da2ce5a05beb
github_commit

commit 20bf65099bb8 (discourse/discourse)

Fix landed in discourse/discourse commit 20bf65099bb8 — awaiting tagged release

https://github.com/discourse/discourse/commit/20bf65099bb861a141bc10e8a4eab65329d91802

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 44× 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. 2026-07-23 02:58 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-22 14:07 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
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  24. 2026-07-06 17:51 UTCOSV refresh
  25. 2026-07-06 16:27 UTCEPSS rescore
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  1. 2026-07-06 16:27 UTCEPSS rescore
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  25. 2026-06-19 19:25 UTCEPSS rescore
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  27. 2026-06-18 17:52 UTCEPSS rescore
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  29. 2026-06-18 06:13 UTCOSV refresh
  30. 2026-06-17 17:52 UTCEPSS rescore
  31. 2026-06-16 17:52 UTCEPSS rescore
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  45. 2026-06-07 15:24 UTCEPSS rescore
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  47. 2026-06-06 13:47 UTCEPSS rescore
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  49. 2026-06-05 22:46 UTCEPSS rescore
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  51. 2026-06-05 06:10 UTCEPSS rescore
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  61. 2026-05-31 00:16 UTCEPSS rescore
  62. 2026-05-31 00:16 UTCEPSS rescore
  63. 2026-05-30 01:10 UTCEG score recompute
  64. 2026-05-29 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-53102?
CVE-2025-53102 is a critical vulnerability published on July 29, 2025. Discourse is an open-source community discussion platform. Prior to version 3.4.7 on the stable branch and version 3.5.0.beta.8 on the tests-passed branch, upon issuing a physical security key for 2FA, the server generates a WebAuthn challenge, which the client signs. The challenge is not cleared…
When was CVE-2025-53102 disclosed?
CVE-2025-53102 was first published in the National Vulnerability Database on July 29, 2025, with the most recent update on August 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-53102 actively exploited?
CVE-2025-53102 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 36.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-53102?
CVE-2025-53102 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-53102?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53102, 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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