What is CVE-2026-27012?

CVE-2026-27012 is a critical-severity vulnerability in Devcode Openstamanager, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-03-03.

How severe is CVE-2026-27012?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Devcode Openstamanager

CVE-2026-27012

OpenSTAManager is an open source management software for technical assistance and invoicing. In 2.9.8 and earlier, a privilege escalation and authentication bypass vulnerability in OpenSTAManager allows any attacker to arbitrarily change a user's group (idgruppo) by directly calling modules/utenti/actions.php. This can promote an existing account (e.g. agent) into the Amministratori group as well as demote any user including existing administrators.

Vulnerability class: Broken Authentication

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

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001

Affected products

Devcode Openstamanager
Devcode-It Openstamanager — versions <= 2.9.8

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

github.com/devcode-it/openstamanager/security/advisories/GHSA-247v-7cw6-q57v (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-27012?: CVE-2026-27012 is a critical-severity vulnerability in Devcode Openstamanager, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-03-03.
How severe is CVE-2026-27012?: Critical severity. CVSS v3 base score is 9.8 out of 10.