What is CVE-2021-40616?

CVE-2021-40616 is a medium-severity vulnerability in Thinkcmf, classified under Direct Request (Forced Browsing). CVSS score: 6.5/10. Published 2022-06-14.

How severe is CVE-2021-40616?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Thinkcmf

CVE-2021-40616

thinkcmf v5.1.7 has an unauthorized vulnerability. The attacker can modify the password of the administrator account with id 1 through the background user management group permissions. The use condition is that the background user management group authority is required.

Published 2022-06-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Thinkcmf — versions 5.1.7

Weakness classification (CWE)

CWE-425 — Direct Request (Forced Browsing)

References

github.com/thinkcmf/thinkcmf/issues/722 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-40616?: CVE-2021-40616 is a medium-severity vulnerability in Thinkcmf, classified under Direct Request (Forced Browsing). CVSS score: 6.5/10. Published 2022-06-14.
How severe is CVE-2021-40616?: Medium severity. CVSS v3 base score is 6.5 out of 10.