CVE-2026-57676Network attack vector

Subscriber-level data disclosure

Published Jun 29, 2026 · Updated Jun 29, 2026

Authorization bypass in Simple User Avatar 4.9 and earlier allows remote authenticated users to read protected data through a user-controlled key. The public CNA and Patchstack records do not identify the affected endpoint, the key, or the missing object-level authorization check. Subscriber-level access is required, and the published impact is limited to unauthorized disclosure without modification or service interruption.

CVSS severity4.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Simple User Avatar 4.9 and earlier allows remote authenticated users to read protected data through a user-controlled key. The public CNA and Patchstack records do not identify the affected endpoint, the key, or the missing object-level authorization check. Subscriber-level access is required, and the published impact is limited to unauthorized disclosure without modification or service interruption.

The record

CVE
CVE-2026-57676
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Matteo Manna
Product
Simple User Avatar
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 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 <=4.9 changes=[{"at":"5.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Matteo Manna · Simple User Avatarversion=n/a <=4.9 changes=[{"at":"5.0","status":"unaffected"}]

Published CVSS scores

4.3PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

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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