CVE-2021-24295

Time-based Blind SQL Injection in Spam protection, AntiSpam, FireWall by CleanTalk < 5.153.4

HIGH
7.5
CVSS Score
Published: May 17, 2021 at 04:48 PM UTC
Updated: June 17, 2026 at 03:39 AM UTC
2 products affected across 2 vendorsSpam Protection , Antispam , FirewallSpam Protection Antispam Firewall

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Severity
HIGH7.5
Exploit prediction
EPSS 5%

Description

It was possible to exploit an Unauthenticated Time-Based Blind SQL Injection vulnerability in the Spam protection, AntiSpam, FireWall by CleanTalk WordPress Plugin before 5.153.4. The update_log function in lib/Cleantalk/ApbctWP/Firewall/SFW.php included a vulnerable query that could be injected via the User-Agent Header by manipulating the cookies set by the Spam protection, AntiSpam, FireWall by CleanTalk WordPress plugin before 5.153.4, sending an initial request to obtain a ct_sfw_pass_key cookie and then manually setting a separate ct_sfw_passed cookie and disallowing it from being reset.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.153.4
Affected range stops below 5.153.4, so it looks safe — our inference, not a vendor statement
v < 5.153.4
Affected range stops below 5.153.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-89

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