How severe is CVE-2019-10066?

CVE-2019-10066 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-10066 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-10066?

CVE-2019-10066 affects Otrs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-10066?

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

When was CVE-2019-10066 published?

CVE-2019-10066 was published on 2019-05-22 and last updated on 2026-06-17.

CVE-2019-10066

CVE-2019-10066 is a medium-severity vulnerability in Otrs with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Otrs
Published: 2019-05-22
Last modified: 2026-06-17

Description

An issue was discovered in Open Ticket Request System (OTRS) 7.x through 7.0.6, Community Edition 6.0.x through 6.0.17, and OTRSAppointmentCalendar 5.0.x through 5.0.12. An attacker who is logged into OTRS as an agent with appropriate permissions may create a carefully crafted calendar appointment in order to cause execution of JavaScript in the context of OTRS.

Frequently asked questions

What is CVE-2019-10066?: An issue was discovered in Open Ticket Request System (OTRS) 7.x through 7.0.6, Community Edition 6.0.x through 6.0.17, and OTRSAppointmentCalendar 5.0.x through 5.0.12. An attacker who is logged into OTRS as an agent with appropriate permissions may create a carefully crafted calendar appointment in order to cause execution of JavaScript in the context of OTRS.
How severe is CVE-2019-10066?: CVE-2019-10066 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-10066 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-10066?: CVE-2019-10066 affects Otrs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-10066?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-10066 published?: CVE-2019-10066 was published on 2019-05-22 and last updated on 2026-06-17.

References

https://community.otrs.com/security-advisory-2019-06-security-update-for-otrs-framework/

Affected products (1)

cpe:2.3:a:otrs:otrs:*:*:*:*:*:*:*:*

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