CVE-2023-27485 — thmmniii/fbs-core is an open source feedback system for students

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 as

01What is this vulnerability?

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…

02Affected products

Vendor	Product	Versions
thm-mni-ii	feedbacksystem	< 1.5.3

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-03-07T18:26:11.365Z
• Last modified: 2025-02-25T15:00:16.500Z

09References

• github.com — https://github.com/thm-mni-ii/feedbacksystem/security/advisories/GHSA-fhq8-p3w6-…
• github.com — https://github.com/thm-mni-ii/feedbacksystem/commit/f1ae67d8bb2286a8eb1594903847…
• github.com — https://github.com/thm-mni-ii/feedbacksystem/releases/tag/v1.5.3
• thm-mni-ii.github.io — https://thm-mni-ii.github.io/feedbacksystem/api-docs/#tag/Submission/operation/g…