How severe is CVE-2019-11537?

CVE-2019-11537 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-2019-11537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11537?

CVE-2019-11537 affects Osticket. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11537?

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

When was CVE-2019-11537 published?

CVE-2019-11537 was published on 2019-04-25 and last updated on 2026-06-17.

CVE-2019-11537

CVE-2019-11537 is a medium-severity vulnerability in Osticket 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: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Osticket
Published: 2019-04-25
Last modified: 2026-06-17

Description

In osTicket before 1.12, XSS exists via /upload/file.php, /upload/scp/users.php?do=import-users, and /upload/scp/ajax.php/users/import if an agent manager user uploads a crafted .csv file to the User Importer, because file contents can appear in an error message. The XSS can lead to local file inclusion.

Frequently asked questions

What is CVE-2019-11537?: In osTicket before 1.12, XSS exists via /upload/file.php, /upload/scp/users.php?do=import-users, and /upload/scp/ajax.php/users/import if an agent manager user uploads a crafted .csv file to the User Importer, because file contents can appear in an error message. The XSS can lead to local file inclusion.
How severe is CVE-2019-11537?: CVE-2019-11537 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-2019-11537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11537?: CVE-2019-11537 affects Osticket. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-11537 published?: CVE-2019-11537 was published on 2019-04-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:osticket:osticket:*:*:*:*:*:*:*:*

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