What is CVE-2021-27885?

CVE-2021-27885 is a high-severity vulnerability in E107, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-03-02.

How severe is CVE-2021-27885?

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

Is CVE-2021-27885 known to be exploited?

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

CSRF in E107

CVE-2021-27885

usersettings.php in e107 through 2.3.0 lacks a certain e_TOKEN protection mechanism.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-03-02 · 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: 0.032 (87.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000

Affected products

E107

Weakness classification (CWE)

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

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

github.com/e107inc/e107/releases (Third Party Advisory, Release Notes)
github.com/e107inc/e107/commit/d9efdb9b5f424b4996c276e754a380a5e251f472 (Patch, Third Party Advisory)
packetstormsecurity.com/files/161651/e107-CMS-2.3.0-Cross-Site-Request-Forgery… (Third Party Advisory)

Frequently asked questions

What is CVE-2021-27885?: CVE-2021-27885 is a high-severity vulnerability in E107, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-03-02.
How severe is CVE-2021-27885?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-27885 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.