CVE-2023-27485 json
Insufficient verification of authorisation when accessing subresults in thmmniii/fbs-core
published 2023-03-07 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-31252
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
thmmniii/fbs-core is an open source feedback system for students. In versions prior to 1.5.3 when querying `subresults`, it is possible to query `subresults` from other users due to insufficient authorisation. This is only possible for logged-in users and it is not possible to associate the subresults with a specific user. This bug was fixed in commit `f1ae67d8bb2`and released with version 1.5.3. Users are advised to upgrade. There are no known workarounds for this issue.
Patch / fix
- thm feedbacksystem 1.5.3
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected products
- thm-mni-ii feedbacksystem
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/thm-mni-ii/feedbacksystem/commit/f1ae67d8bb2286a8eb15949038473d41b1358493
patch
-
github.com
/thm-mni-ii/feedbacksystem/security/advisories/GHSA-fhq8-p3w6-mmgr
patch, third-party-advisory
-
github.com
/thm-mni-ii/feedbacksystem/releases/tag/v1.5.3
release-notes
-
thm-mni-ii.github.io
/feedbacksystem/api-docs/#tag/Submission/operation/getCourseTaskSubmissionSubresults
product
Sources
- CVE List CVE-2023-27485
- NVD CVE-2023-27485
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.