Security readout for executives and security teams
Plain-English summary
CVE-2026-27411 is a CAPTCHA bypass in the WordPress SiteGuard WP Plugin through version 1.7.9. An attacker may be able to get around CAPTCHA-based checks, reducing protection against automated or unauthorized activity. Public sources rate it medium severity, with limited confidentiality and integrity impact.
Executive priority
Treat this as a moderate-priority WordPress plugin issue. It does not have confirmed active exploitation in the provided sources, but affected public sites should be inventoried and updated or mitigated promptly because CAPTCHA bypass can weaken anti-abuse controls.
Technical view
The issue is described as CWE-804, Guessable CAPTCHA, in jp-secure SiteGuard WP Plugin siteguard <=1.7.9. CVSS 3.1 is 5.4: network-accessible, unauthenticated, no user interaction, high attack complexity, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is likely limited to WordPress sites running SiteGuard WP Plugin version 1.7.9 or earlier. Risk is higher where site defenses depend on the plugin’s CAPTCHA to protect forms, login-related workflows, or anti-automation controls.
Exploitation context
The CVE is not listed as KEV in the provided data, and no cited source states active exploitation. The CVSS vector indicates remote unauthenticated attack conditions, but high attack complexity. Public technical details are limited in the supplied sources.
Researcher notes
The supplied record identifies the weakness class and CVSS vector but gives little implementation detail. The affected metadata is sparse and somewhat inconsistent, so validate against the plugin’s official release history and Patchstack entry before making final exposure decisions.
Mitigation direction
- Inventory WordPress sites for SiteGuard WP Plugin installations.
- Identify any installations running version 1.7.9 or earlier.
- Check jp-secure, WordPress.org, or Patchstack guidance for a fixed release.
- Upgrade or disable the plugin according to vendor guidance.
- Review CAPTCHA-dependent controls for compensating anti-automation protections.
Validation and detection
- Confirm the plugin is installed only where required.
- Record the installed SiteGuard WP Plugin version on each WordPress site.
- Compare installed versions against the affected range: through 1.7.9.
- Verify vendor advisories for fixed-version information before closing remediation.
- Monitor logs for unusual automated form or authentication activity.
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-804: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCVE-2026-27411 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
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
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.
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:H/PR:N/UI:N/S:C/C:L/I:L/A:N2.22.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
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.
Guessable CAPTCHA
Guessable CAPTCHA represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.