What is CVE-2021-23266?

CVE-2021-23266 is a medium-severity vulnerability in Craftercms Crafter Cms, classified under Improper Output Neutralization for Logs. CVSS score: 4.3/10. Published 2022-05-16.

How severe is CVE-2021-23266?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Craftercms Crafter Cms

CVE-2021-23266

An anonymous user can craft a URL with text that ends up in the log viewer as is. The text can then include textual messages to mislead the administrator.

Published 2022-05-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000

Affected products

Craftercms Crafter Cms
Crafter Software Cms — versions 3.1

Weakness classification (CWE)

References

docs.craftercms.org/en/3.1/security/advisory.html (Vendor Advisory)

Frequently asked questions

What is CVE-2021-23266?: CVE-2021-23266 is a medium-severity vulnerability in Craftercms Crafter Cms, classified under Improper Output Neutralization for Logs. CVSS score: 4.3/10. Published 2022-05-16.
How severe is CVE-2021-23266?: Medium severity. CVSS v3 base score is 4.3 out of 10.