CVE-2026-27411Network attack vector

Unauthenticated CAPTCHA bypass via guessable challenges

Published Mar 5, 2026 · Updated Mar 5, 2026

Guessable CAPTCHA in EG Secure Solutions SiteGuard WP Plugin 1.7.9 and earlier allows remote attackers to bypass CAPTCHA checks. The vendor and CNA identify the CAPTCHA challenge-generation path as guessable but do not disclose how challenge values are selected or validated. No authentication or user interaction is required; the bypass affects CAPTCHA-protected login, comment, password-reset, and registration forms without a reported availability impact.

CVSS severity5.4
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Guessable CAPTCHA in EG Secure Solutions SiteGuard WP Plugin 1.7.9 and earlier allows remote attackers to bypass CAPTCHA checks. The vendor and CNA identify the CAPTCHA challenge-generation path as guessable but do not disclose how challenge values are selected or validated. No authentication or user interaction is required; the bypass affects CAPTCHA-protected login, comment, password-reset, and registration forms without a reported availability impact.

The record

CVE
CVE-2026-27411
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
EG Secure Solutions
Product
SiteGuard WP Plugin
Classifications
CWE-804, CAPEC-554
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=<= 1.7.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

EG Secure Solutions · SiteGuard WP Pluginversion=n/a <=<= 1.7.9

Published CVSS scores

5.4PatchstackCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-804Guessable CAPTCHA
CAPEC-554Functionality Bypass

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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