CVE-2025-53102 json
Discourse's WebAuthn challenge isn't cleared from user session after authentication
published 2025-07-29 15 mo ago modified 2026-09-10 59 d ago also BIT-discourse-2025-53102 , EUVD-2025-23042 , GHSA-hv49-93h5-4wcv
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami discourse 3.4.7
- discourse discourse 3.4.7, 3.5.0.beta.8
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 15 mo ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.2 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.2 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | discourse | <3.4.7 |
3.4.7 |
Affected products
- discourse discourse
Classification
- Weakness
-
- CWE-384 Session Fixation
References
-
github.com
/discourse/discourse/commit/20bf65099bb861a141bc10e8a4eab65329d91802
patch
-
github.com
/discourse/discourse/commit/8bc0cee2c00a514ea60f33ea6172da2ce5a05beb
patch
-
github.com
/discourse/discourse/security/advisories/GHSA-hv49-93h5-4wcv
third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-53102
web
Sources
- CVE List CVE-2025-53102
- NVD CVE-2025-53102
- OSV BIT-discourse-2025-53102
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.