How severe is CVE-2019-9870?

CVE-2019-9870 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-9870 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9870?

CVE-2019-9870 affects Oembed Project Oembed. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-9870?

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

When was CVE-2019-9870 published?

CVE-2019-9870 was published on 2019-03-21 and last updated on 2026-06-17.

CVE-2019-9870

CVE-2019-9870 is a critical-severity vulnerability in Oembed Project Oembed with a CVSS 3.x base score of 9.8. 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-19.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-19
Affected product: Oembed Project Oembed
Published: 2019-03-21
Last modified: 2026-06-17

Description

plugin.js in the w8tcha oEmbed plugin before 2019-03-14 for CKEditor mishandles SCRIPT elements.

Frequently asked questions

What is CVE-2019-9870?: plugin.js in the w8tcha oEmbed plugin before 2019-03-14 for CKEditor mishandles SCRIPT elements.
How severe is CVE-2019-9870?: CVE-2019-9870 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-9870 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9870?: CVE-2019-9870 affects Oembed Project Oembed. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-9870?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-9870 published?: CVE-2019-9870 was published on 2019-03-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oembed_project:oembed:*:*:*:*:*:ckeditor:*:*

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