What is CVE-2019-12823?

CVE-2019-12823 is a medium-severity vulnerability in Craftcms Craft Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-06-18.

How severe is CVE-2019-12823?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2019-12823 known to be exploited?

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

XSS in Craftcms Craft Cms

CVE-2019-12823

Craft CMS before 3.1.31 does not properly filter XML feeds and thus allowing XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-06-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (60.8th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Craftcms Craft Cms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

p1ay8y3ar/cve_

References

github.com/craftcms/cms/blob/master/CHANGELOG-v3.md (Third Party Advisory, Release Notes)
github.com/craftcms/cms/commit/6432eca59b93bcea2ca2616199e5d419447e613f (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-12823?: CVE-2019-12823 is a medium-severity vulnerability in Craftcms Craft Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-06-18.
How severe is CVE-2019-12823?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2019-12823 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.