How severe is CVE-2019-18856?

CVE-2019-18856 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-18856 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18856?

CVE-2019-18856 primarily affects Drupal Svg Sanitizer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-18856?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-18856 published?

CVE-2019-18856 was published on 2019-11-11 and last updated on 2026-06-17.

CVE-2019-18856

CVE-2019-18856 is a high-severity vulnerability in Drupal Svg Sanitizer with a CVSS 3.x base score of 7.5. 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-732.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Drupal Svg Sanitizer
Published: 2019-11-11
Last modified: 2026-06-17

Description

A Denial Of Service vulnerability exists in the SVG Sanitizer module through 8.x-1.0-alpha1 for Drupal because access to external resources with an SVG use element is mishandled.

Frequently asked questions

What is CVE-2019-18856?: A Denial Of Service vulnerability exists in the SVG Sanitizer module through 8.x-1.0-alpha1 for Drupal because access to external resources with an SVG use element is mishandled.
How severe is CVE-2019-18856?: CVE-2019-18856 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-18856 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18856?: CVE-2019-18856 primarily affects Drupal Svg Sanitizer. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-18856?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-18856 published?: CVE-2019-18856 was published on 2019-11-11 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:drupal:svg_sanitizer:*:*:*:*:*:drupal:*:*
cpe:2.3:a:drupal:svg_sanitizer:8.x-1.0:alpha1:*:*:*:drupal:*:*

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