Is winter/wn-backend-module affected by CVE-2026-27591?

Packagist winter/wn-backend-module is affected in >=1.2.0 =1.1.0 <1.1.12, <1.0.477.

Is CVE-2026-27591 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

critical

CVE-2026-27591

Q: Is CVE-2026-27591 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

Packagist · winter/wn-backend-module

Summary

Winter vulnerable to privilege escalation by authenticated backend users

Severity: critical
EPSS: 0.5% (p38)
Also known as: GHSA-pgpf-m8m4-6cg6
Published: 2026-03-12

References

https://github.com/wintercms/winter/security/advisories/GHSA-pgpf-m8m4-6cg6
https://nvd.nist.gov/vuln/detail/CVE-2026-27591
https://github.com/wintercms/winter

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.