LiteSpeed Cache < 4.4.4 - IP Check Bypass to Unauthenticated Stored XSS
CVE-2021-24964
6.1MEDIUM
What is CVE-2021-24964?
The LiteSpeed Cache WordPress plugin before 4.4.4 does not properly verify that requests are coming from QUIC.cloud servers, allowing attackers to make requests to certain endpoints by using a specific X-Forwarded-For header value. In addition, one of the endpoint could be used to set CSS code if a setting is enabled, which will then be output in some pages without being sanitised and escaped. Combining those two issues, an unauthenticated attacker could put Cross-Site Scripting payloads in pages visited by users.
Affected Version(s)
LiteSpeed Cache 4.4.4
References
EPSS Score
14% chance of being exploited in the next 30 days.
CVSS V3.1
Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed
Timeline
Vulnerability published
Vulnerability Reserved
Credit
Emil Kylander