CVE-2026-90936Public exploitNetwork attack vectorHinoki check available

Cross-tenant alias disclosure via unscoped sender lookup

Published Sep 14, 2026 · Updated Sep 14, 2026

Information disclosure in Froxlor 2.3.6 and earlier allows remote authenticated users to read other customers' sender aliases. customer_email.php selects allowed_sender using an attacker-supplied global senderid without restricting the query to the current customer or mailbox. The flaw is reachable on multi-tenant installations when mail.enable_allow_sender is enabled; the confirmation flow exposes alias text but revalidates ownership before deletion.

CVSS severity4.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in Froxlor 2.3.6 and earlier allows remote authenticated users to read other customers' sender aliases. customer_email.php selects allowed_sender using an attacker-supplied global senderid without restricting the query to the current customer or mailbox. The flaw is reachable on multi-tenant installations when mail.enable_allow_sender is enabled; the confirmation flow exposes alias text but revalidates ownership before deletion.

The record

CVE
CVE-2026-90936
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Froxlor
Product
Froxlor
Classifications
CWE-200
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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 <2.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Froxlor · Froxlorversion=0 <2.3.7

Published CVSS scores

4.3GitHubCVSS: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

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

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Technologies

Your stack

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Your stack

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