Security readout for executives and security teams
Plain-English summary
A critical SQL injection flaw affects the WordPress Security & Malware scan by CleanTalk plugin through version 2.184. An internet-based attacker may exploit it without logging in or convincing a user to act. The supplied scoring indicates serious confidentiality risk and limited availability impact, but no confirmed integrity impact.
Executive priority
Treat this as an urgent inventory and remediation issue for internet-facing WordPress sites. Prioritize systems holding sensitive data because the supplied assessment indicates high confidentiality impact. Do not characterize it as actively exploited without new evidence.
Technical view
CVE-2026-66593 is an unauthenticated SQL injection vulnerability, classified as CWE-89, in package security-malware-firewall. CVSS 3.1 scores it 9.3: network-accessible, low complexity, no privileges or interaction required, with changed scope, high confidentiality impact, no integrity impact, and low availability impact.
Likely exposure
WordPress sites running the CleanTalk Security & Malware scan plugin at version 2.184 or earlier are potentially exposed, particularly when publicly reachable. The supplied structured affected-version field says “n/a” and default status “unaffected,” so inventories should verify the installed package and reconcile this inconsistency with current vendor guidance.
Exploitation context
The CVSS vector supports remote, unauthenticated, low-complexity exploitation. However, the bundle contains no technical attack details, proof of concept, or evidence of exploitation in the wild. The CVE is not listed as KEV in the supplied data.
Researcher notes
Public details are limited to the vulnerability class, affected-version claim, and CVSS vector. The title and description state versions through 2.184, while the structured affected record lists versions as “n/a” and default status as “unaffected.” Patch availability, vulnerable parameter, request path, prerequisites, and observed exploitation are not established by the supplied evidence.
Mitigation direction
- Inventory WordPress installations for the security-malware-firewall package and record installed versions.
- Check CleanTalk and Patchstack guidance for a confirmed remediated release or vendor-approved mitigation.
- Prioritize updating affected installations after testing when a confirmed fixed version is available.
- If remediation is unavailable, consider temporarily deactivating the plugin based on operational risk.
- Restrict unnecessary public access and monitor affected sites until remediation is confirmed.
Validation and detection
- Confirm the plugin package identifier and installed version on every WordPress site.
- Verify whether each installation is publicly reachable or otherwise accessible to untrusted networks.
- Compare installed versions with current CleanTalk and Patchstack remediation guidance.
- Review database, application, and web logs for unexplained query errors or suspicious unauthenticated requests.
- After remediation, confirm the affected version is absent and normal site functionality remains intact.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-66593 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L3.94.7PatchstackVulnerability scoring details
Base CVSS 3.1 score
9.3CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an SQL Command
Improper Neutralization of Special Elements used in an SQL Command represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.