What is CVE-2019-12203?

CVE-2019-12203 is a medium-severity vulnerability in Silverstripe, classified under Session Fixation. CVSS score: 6.3/10. Published 2019-09-25.

How severe is CVE-2019-12203?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Vulnerability in Silverstripe

CVE-2019-12203

SilverStripe through 4.3.3 allows session fixation in the "change password" form.

Published 2019-09-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (29.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Silverstripe

Weakness classification (CWE)

CWE-384 — Session Fixation

References

www.silverstripe.org/download/security-releases/ (Vendor Advisory)
forum.silverstripe.org/c/releases (Release Notes, Vendor Advisory)
www.silverstripe.org/download/security-releases/CVE-2019-12203 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-12203?: CVE-2019-12203 is a medium-severity vulnerability in Silverstripe, classified under Session Fixation. CVSS score: 6.3/10. Published 2019-09-25.
How severe is CVE-2019-12203?: Medium severity. CVSS v3 base score is 6.3 out of 10.