What is CVE-2023-27891?

CVE-2023-27891 is a high-severity vulnerability in Rami Pretix, classified under Insufficient Session Expiration. CVSS score: 7.5/10. Published 2023-03-06.

How severe is CVE-2023-27891?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Rami Pretix

CVE-2023-27891

rami.io pretix before 4.17.1 allows OAuth application authorization from a logged-out session. The fixed versions are 4.15.1, 4.16.1, and 4.17.1.

Published 2023-03-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Rami Pretix — versions 4.16.0, 4.17.0

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

pretix.eu/about/en/blog/20230306-release-4171/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-27891?: CVE-2023-27891 is a high-severity vulnerability in Rami Pretix, classified under Insufficient Session Expiration. CVSS score: 7.5/10. Published 2023-03-06.
How severe is CVE-2023-27891?: High severity. CVSS v3 base score is 7.5 out of 10.