How severe is CVE-2019-9554?

CVE-2019-9554 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-9554 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9554?

CVE-2019-9554 affects Craftcms Craft Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-9554?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-9554 published?

CVE-2019-9554 was published on 2019-12-31 and last updated on 2026-06-17.

CVE-2019-9554

CVE-2019-9554 is a medium-severity vulnerability in Craftcms Craft Cms with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Craftcms Craft Cms
Published: 2019-12-31
Last modified: 2026-06-17

Description

In the 3.1.12 Pro version of Craft CMS, XSS has been discovered in the header insertion field when adding source code at an s/admin/entries/news/new URI.

Frequently asked questions

What is CVE-2019-9554?: In the 3.1.12 Pro version of Craft CMS, XSS has been discovered in the header insertion field when adding source code at an s/admin/entries/news/new URI.
How severe is CVE-2019-9554?: CVE-2019-9554 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-9554 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9554?: CVE-2019-9554 affects Craftcms Craft Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-9554?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-9554 published?: CVE-2019-9554 was published on 2019-12-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:craftcms:craft_cms:3.1.12:*:*:*:pro:*:*:*

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