CVE-2020-36875Known exploitationPublic exploitNetwork attack vector

Unauthenticated PHP code execution via login_error processing

Published Jan 9, 2026 · Updated Jan 9, 2026

Code injection in the AccessAlly Login Widget before 3.3.2 allows remote attackers to execute arbitrary PHP through login_error. The login_error function interprets the request parameter as PHP code rather than treating it as data, then runs it in the WordPress web server process. No authentication or user interaction is required; a crafted HTTP request grants code execution with the web server process's permissions.

CVSS severity9.3
Critical
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in the AccessAlly Login Widget before 3.3.2 allows remote attackers to execute arbitrary PHP through login_error. The login_error function interprets the request parameter as PHP code rather than treating it as data, then runs it in the WordPress web server process. No authentication or user interaction is required; a crafted HTTP request grants code execution with the web server process's permissions.

The record

CVE
CVE-2020-36875
Published
Jan 9, 2026
Updated
Jan 9, 2026
Vendor
AccessAlly, Inc.
Product
AccessAlly
Classifications
CWE-94, T1059, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2020Exploitation reportedWPScan reported active exploitation
  2. Jan 9, 2026CVE publishedPublication date reported by the CVE source.
  3. Jan 9, 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=0 <3.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AccessAlly, Inc. · AccessAllyversion=0 <3.3.2

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter
T1190Exploit Public-Facing Application

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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