What is CVE-2020-22761?

CVE-2020-22761 is a high-severity vulnerability in Flatpress, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-07-30.

How severe is CVE-2020-22761?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2020-22761 known to be exploited?

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

CSRF in Flatpress

CVE-2020-22761

Cross Site Request Forgery (CSRF) vulnerability in FlatPress 1.1 via the DeleteFile function in flat/admin.php.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-07-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.5% 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

Flatpress — versions 1.1

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

Public proof-of-concept exploits

References

github.com/flatpressblog/flatpress/issues/64 (Exploit, Patch, Third Party Advisory, Issue Tracking)
www.baomatcoban.info/2020/04/funnymini0day-flatpress-11-cross-site.html (URL Repurposed, Third Party Advisory, Broken Link)

Frequently asked questions

What is CVE-2020-22761?: CVE-2020-22761 is a high-severity vulnerability in Flatpress, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-07-30.
How severe is CVE-2020-22761?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2020-22761 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.