This security bulletin contains one high risk vulnerability.
Exploit availability: NoDescription
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to insufficient validation of user-supplied input in "append/override_content_security_policy_directives". A remote unauthenticated attacker can inject a semicolon, use it to override a script directive and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.Mitigation
Install updates from vendor's website.Vulnerable software versions
secure_headers: 0.4.2 - 6.1.2
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.