What is CVE-2022-4606?

CVE-2022-4606 is a critical-severity vulnerability in Flatpress, classified under PHP Remote File Inclusion. CVSS score: 9.8/10. Published 2022-12-18.

How severe is CVE-2022-4606?

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

Is CVE-2022-4606 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Flatpress

CVE-2022-4606

PHP Remote File Inclusion in GitHub repository flatpressblog/flatpress prior to 1.3.

Published 2022-12-18 · 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: 0.354 (98.4th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.354 · newest: 0.354 · change: 0.000

Affected products

Flatpress
Flatpressblog Flatpressblog/flatpress — versions unspecified

Weakness classification (CWE)

CWE-98 — PHP Remote File Inclusion

Public proof-of-concept exploits

References

huntr.dev/bounties/3dab0466-c35d-4163-b3c7-a8666e2f7d95 (Exploit, Patch, Third Party Advisory)
github.com/flatpressblog/flatpress/commit/c30d52b28483e1e512d0d81758d4c149f02b4… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-4606?: CVE-2022-4606 is a critical-severity vulnerability in Flatpress, classified under PHP Remote File Inclusion. CVSS score: 9.8/10. Published 2022-12-18.
How severe is CVE-2022-4606?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-4606 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.