How severe is CVE-2019-20366?

CVE-2019-20366 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-2019-20366 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20366?

CVE-2019-20366 affects Igniterealtime Openfire. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20366?

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

When was CVE-2019-20366 published?

CVE-2019-20366 was published on 2020-01-08 and last updated on 2026-06-17.

CVE-2019-20366

CVE-2019-20366 is a medium-severity vulnerability in Igniterealtime Openfire 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: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Igniterealtime Openfire
Published: 2020-01-08
Last modified: 2026-06-17

Description

An XSS issue was discovered in Ignite Realtime Openfire 4.4.4 via isTrustStore to Manage Store Contents.

Frequently asked questions

What is CVE-2019-20366?: An XSS issue was discovered in Ignite Realtime Openfire 4.4.4 via isTrustStore to Manage Store Contents.
How severe is CVE-2019-20366?: CVE-2019-20366 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-2019-20366 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20366?: CVE-2019-20366 affects Igniterealtime Openfire. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20366?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-20366 published?: CVE-2019-20366 was published on 2020-01-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:igniterealtime:openfire:4.4.4:*:*:*:*:*:*:*

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