CVE-2020-28246Network attack vector

Admin-only code execution via email template deletion

Published May 31, 2022 · Updated Aug 4, 2024

Server-side template injection in Form.io 2.0.0 allows remote authenticated users to execute code by deleting the default Email template URL. Published material does not identify the deletion handler, template engine, or operation that evaluates untrusted template content. Form.io disputes the report, stating that only administrators can reach the sandboxed execution path, so no sandbox escape is established.

CVSS severity9.8
Critical
EPSS probability2.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in Form.io 2.0.0 allows remote authenticated users to execute code by deleting the default Email template URL. Published material does not identify the deletion handler, template engine, or operation that evaluates untrusted template content. Form.io disputes the report, stating that only administrators can reach the sandboxed execution path, so no sandbox escape is established.

The record

CVE
CVE-2020-28246
Published
May 31, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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