CVE-2021-4398Network attack vector

Metadata modification via missing nonce validation

Published Jul 1, 2023 · Updated Apr 8, 2026

CSRF in Marco Milesi Amministrazione Trasparente 7.1 and earlier allows remote attackers to modify metadata through a forged request. The at_save_aturl_meta() function accepts state-changing input without correctly validating a WordPress nonce, causing attacker-supplied metadata to be saved under an administrator's session. An administrator must be authenticated and induced to submit the forged request, and the demonstrated consequence is unauthorized metadata modification.

CVSS severity4.3
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Marco Milesi Amministrazione Trasparente 7.1 and earlier allows remote attackers to modify metadata through a forged request. The at_save_aturl_meta() function accepts state-changing input without correctly validating a WordPress nonce, causing attacker-supplied metadata to be saved under an administrator's session. An administrator must be authenticated and induced to submit the forged request, and the demonstrated consequence is unauthorized metadata modification.

The record

CVE
CVE-2021-4398
Published
Jul 1, 2023
Updated
Apr 8, 2026
Vendor
Marco Milesi
Product
Amministrazione Trasparente
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Marco Milesi · Amministrazione Trasparenteversion=0 <=7.1

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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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-352Cross-Site Request Forgery (CSRF)

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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