What is CVE-2021-27312?

CVE-2021-27312 is a critical-severity vulnerability in Gleezcms Gleez Cms, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.4/10. Published 2024-04-03.

How severe is CVE-2021-27312?

Critical severity. CVSS v3 base score is 9.4 out of 10.

SSRF in Gleezcms Gleez Cms

CVE-2021-27312

Server Side Request Forgery (SSRF) vulnerability in Gleez Cms 1.2.0, allows remote attackers to execute arbitrary code and obtain sensitive information via modules/gleez/classes/request.php.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2024-04-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.010 (62.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Gleezcms Gleez Cms — versions 1.2.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

github.com/gleez/cms/issues/805 (Issue Tracking)
gist.github.com/LioTree/8d10d123d31f50db05a25586e62a87ba (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-27312?: CVE-2021-27312 is a critical-severity vulnerability in Gleezcms Gleez Cms, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.4/10. Published 2024-04-03.
How severe is CVE-2021-27312?: Critical severity. CVSS v3 base score is 9.4 out of 10.