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GHSA-2qh5-382h-3jpc
cakephp/cakephpcakephp/cakephpcakephp/cakephpImpact
Custom mail headers added with Message::setHeaders() or addHeaders() do not have CRLF replaced allowing header injection if user controlled data is added to message headers without stripping CRLF bytes.
Patches
5.3.7, 5.2.14, 5.1.9, 4.6.5, 4.5.12 contain fixes for this issue.
Workarounds
You can strip CRLF bytes from email header values before setting header values.
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The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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