In Zammad 6.4.x before 6.4.2, SSRF can occur. Authenticated admin users can enable webhooks in Zammad, which are triggered as POST requests when certain conditions are met. If a webhook endpoint returned a redirect response, Zammad would follow it automatically with another GET request. This could be abused by an attacker to cause GET requests for example in the local network.
{
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "6.4"
},
{
"fixed": "6.4.2"
}
]
},
{
"source": "CPE_FIELD",
"extracted_events": [
{
"introduced": "6.4"
},
{
"fixed": "6.4.2"
}
]
},
{
"source": "DESCRIPTION",
"extracted_events": [
{
"introduced": "6.4.x"
},
{
"fixed": "6.4.2"
}
]
}
],
"cna_assigner": "mitre",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/32xxx/CVE-2025-32358.json",
"cwe_ids": [
"CWE-918"
]
}