CVE-2021-24226Public exploitNetwork attack vector

Environment-variable disclosure via serialized server data

Published Apr 12, 2021 · Updated Aug 3, 2024

Information disclosure in AccessAlly before 3.5.7 allows remote attackers to read server environment variables from public order-form pages. The order-form shortcode code in resource/frontend/product/product-shortcode.php serializes $_SERVER and emits the result into rendered page content. No login is required, but exposure requires a public page containing the [accessally_order_form] shortcode; the reported impact is read-only disclosure.

CVSS severity7.5
High
EPSS probability5.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in AccessAlly before 3.5.7 allows remote attackers to read server environment variables from public order-form pages. The order-form shortcode code in resource/frontend/product/product-shortcode.php serializes $_SERVER and emits the result into rendered page content. No login is required, but exposure requires a public page containing the [accessally_order_form] shortcode; the reported impact is read-only disclosure.

The record

CVE
CVE-2021-24226
Published
Apr 12, 2021
Updated
Aug 3, 2024
Vendor
AccessAlly, Inc.
Product
AccessAlly
Classifications
CWE-200, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.5.6 <3.5.6*
  2. Affected versionversion=3.5.7 <3.5.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AccessAlly, Inc. · AccessAllyversion=3.5.6 <3.5.6*; version=3.5.7 <3.5.7

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo