What’s Vulnerable › Vulnerabilities

CVE-2020-16193

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-26 · updated 2026-07-10
• Weakness: CWE-79

Description

osTicket before 1.14.3 allows XSS because include/staff/banrule.inc.php has an unvalidated echo $info['notes'] call.

Affected products

• osticket/osticket: before 1.14.3 — fixed in 1.14.3

How to fix

Upgrade to a fixed version: osticket/osticket 1.14.3. Check the vendor advisory for mitigations.

References

• https://github.com/osTicket/osTicket/blob/develop/include/staff/banrule.inc.php#L67
• https://github.com/osTicket/osTicket/pull/5616/commits/fb570820ef1138776f929a179906e1d8089179d9
• https://github.com/osTicket/osTicket/blob/develop/include/staff/banrule.inc.php#L67
• https://github.com/osTicket/osTicket/pull/5616/commits/fb570820ef1138776f929a179906e1d8089179d9

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