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Froxlor EUVDEUVD-2026-105092

| CVE-2026-113676 MEDIUM
Incorrect Authorization (CWE-863)
2026-10-20 VulnCheck GHSA-fhvc-6pwx-657g
5.3
CVSS 4.0 · Vendor: VulnCheck
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate as low-privileged reseller
  2. Exploit
    Call Admins.get with own loginname and another admin's id
  3. Execution
    Bypass OR-based identifier authorization gate
  4. Impact
    Read target admin's contact, allow-lists and login history

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires a valid, authenticated reseller account on the target Froxlor instance that lacks the change_serversettings privilege (PR:L); there is no path for a fully unauthenticated attacker. Exploitation is triggered by invoking the Admins.get API command with the caller's own loginname paired with another admin's numeric id, exploiting an OR-based identity check where a mismatched id still drove the backing query. Limiting factors: the attacker must already hold reseller credentials, the result is read-only disclosure of admin metadata (no modification possible), and only versions 0.10.0 through 2.3.14 are affected (fixed in 2.3.15). No special non-default configuration or user interaction is needed beyond possessing a reseller account.

Impact

Signals are consistent and point to a moderate, not urgent, priority. The vendor CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N) scores 5.3 (medium): network-reachable API, low complexity, but requires an authenticated low-privileged reseller account (PR:L) and yields only limited confidentiality impact with no integrity or availability effect. There is no EPSS score in the input and the CVE is not on CISA KEV, so there is no public evidence of active exploitation; exploitation status is best described as no public exploit identified at time of analysis, although the vendor fix commit and GHSA advisory fully disclose the bypass logic, lowering the bar to reproduce it. CWE-863 (Incorrect Authorization) and the description agree the flaw is an authorization bypass yielding read-only disclosure of another admin's metadata (contact email, IP allow-lists, resource limits, notes, login history) - this is an information-disclosure/recon issue, not remote code execution or account takeover. Net: a real but bounded issue requiring insider-level reseller access; patch promptly where untrusted resellers exist, but it is a medium-CVSS, low-real-risk item rather than an internet-wide emergency. EPSS/KEV data are absent (not conflicting) - absence of exploitation signals is expected for a freshly disclosed, access-gated information leak.

Exploit ScenarioDerived

A malicious or compromised reseller on a shared Froxlor hosting server calls the Admins.get API, supplying their own loginname together with a different admin's numeric id. The identifier-confusion bypass returns the targeted admin's full record, letting the attacker harvest contact emails, IP allow-lists, resource limits, and login history for reconnaissance against higher-privileged accounts. No public weaponized exploit is available, but the patch commit publicly reveals the exact bypass condition; network vector with low complexity means the request itself is trivial to craft.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

An authorization bypass in the Froxlor hosting control panel (versions 0.10.0 through 2.3.14) lets an authenticated reseller read any administrator's full account record through the Admins.get API command by pairing their own loginname with another admin's numeric id. The flaw is an OR-based identity check in lib/Froxlor/Api/Commands/Admins.php: a mismatched id/loginname pair still passed the privilege gate, while the subsequent database query was driven by the numeric id alone, exposing contact email addresses, IP allow-lists, resource limits, internal notes, and login history for arbitrary admins. Impact is read-only information disclosure of administrator metadata from a low-privileged account (no modification is possible), no public exploit code was identified at time of analysis, and the issue is fixed in Froxlor 2.3.15.

RemediationAI

Vendor-released patch: upgrade to Froxlor 2.3.15 or later (release tag https://github.com/froxlor/froxlor/releases/tag/2.3.15), which contains commit 981400f36a0c3b5a7012e15a17dfc5fe7146fa0a hardening Admins.get() so that any supplied id or loginname not matching the caller's own identity returns HTTP 403. Validate the fix by confirming lib/Froxlor/Api/Commands/Admins.php contains the added change_serversettings guard before line ~445, and re-test by calling the Admins.get API as a reseller with your own loginname plus another admin's id, which should now be rejected. If an immediate upgrade is not possible, compensating controls include temporarily removing reseller accounts or withholding the reseller role from untrusted users (trade-off: loss of delegated hosting management), auditing existing reseller accounts for unexpected access and rotating admin credentials and reviewing login history for the affected admin ids (trade-off: operational effort and possible session disruption), and restricting API access for reseller accounts at the web server or reverse proxy layer to trusted source addresses (trade-off: breaks legitimate remote reseller workflows). Because only administrator metadata disclosure is possible, no data-integrity rollback is required, but exposed IP allow-lists and contact addresses should be treated as leaked.

Affected VersionsENISA

Froxlor 0.10.0 <2.3.15

Affected Packages

euvd froxlor fix: 2.3.15

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Froxlor is a PHP-based web hosting control panel that separates administration between full admins and resellers; privileges are gated by flags such as change_serversettings, and API commands are dispatched through classes under lib/Froxlor/Api/Commands/. CVE-2026-113676 is a CWE-863 incorrect authorization flaw in the Admins.get() handler. Before the fix, the guard that was meant to confine resellers (admins without the change_serversettings privilege) to their own record used a boolean OR over the supplied identifier values: because either the caller's own loginname or a matching check could satisfy the condition, supplying the caller's legitimate loginname together with a different admin's numeric id passed the gate, yet the follow-up query selecting the admin row was built from the id parameter alone. The upstream commit 981400f36a0c3b5a7012e15a17dfc5fe7146fa0a rewrites this as an AND-style rejection: any supplied identifier that does not match the caller's own adminid or loginname now throws a 403 'Not allowed to execute given command' exception. The weakness is confined to the API command layer and requires an existing authenticated reseller session; it does not grant privilege escalation, write access, or remote code execution, only disclosure of administrator account metadata.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (VulnCheck) PRIMARY 5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
vuln.today AI 4.3 MEDIUM

Network API reachable with low complexity, but a reseller account is required so PR:L; only partial read of another admin's metadata gives C:L with no integrity or availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

Froxlor from 0.10.0 before 2.3.15 contains an authorization bypass vulnerability in the Admins.get API command that allows resellers to read any admin record via identifier confusion. Attackers can send their own loginname with another admin's numeric id to retrieve contact email, IP allow-lists, resource limits, notes, and login history.

Threat Intelligence Overview

EPSS Score
0.4%
Top 68% exploitable
Prevalence
Low
niche open-source hosting control panel, limited enterprise footprint versus cPanel/Plesk
Data Quality
5 sources
Confidence: Medium
EUVD NVD CVE.org EPSS Vulnrichment GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.4%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
Poc
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

CVE-2023-0315 HIGH POC
8.8 Jan 16

Command Injection in GitHub repository froxlor/froxlor prior to 2.0.8. Rated high severity (CVSS 8.8), this vulnerabilit

CVE-2023-3173 CRITICAL POC
9.8 Jun 09

Improper Restriction of Excessive Authentication Attempts in GitHub repository froxlor/froxlor prior to 2.0.20. Rated cr

CVE-2023-1307 CRITICAL POC
9.8 Mar 10

Authentication Bypass by Primary Weakness in GitHub repository froxlor/froxlor prior to 2.0.13. Rated critical severity

CVE-2021-42325 CRITICAL POC
9.8 Oct 12

Froxlor through 0.10.29.1 allows SQL injection in Database/Manager/DbManagerMySQL.php via a custom DB name. Rated critic

CVE-2026-26279 CRITICAL POC
9.1 Mar 03

Command injection in Froxlor server admin before 2.3.4 due to typo (== instead of =) disabling input validation entirely

CVE-2023-6069 HIGH POC
8.8 Nov 10

Improper Link Resolution Before File Access in GitHub repository froxlor/froxlor prior to 2.1.0. Rated high severity (CV

CVE-2023-2034 HIGH POC
8.8 Apr 14

Unrestricted Upload of File with Dangerous Type in GitHub repository froxlor/froxlor prior to 2.0.14. Rated high severit

CVE-2023-1033 HIGH POC
8.8 Feb 25

Cross-Site Request Forgery (CSRF) in GitHub repository froxlor/froxlor prior to 2.0.11. Rated high severity (CVSS 8.8),

CVE-2023-0877 HIGH POC
8.8 Feb 17

Code Injection in GitHub repository froxlor/froxlor prior to 2.0.11. Rated high severity (CVSS 8.8), this vulnerability

CVE-2023-0671 HIGH POC
8.8 Feb 04

Code Injection in GitHub repository froxlor/froxlor prior to 2.0.10. Rated high severity (CVSS 8.8), this vulnerability

CVE-2020-10235 HIGH POC
8.8 Mar 09

An issue was discovered in Froxlor before 0.10.14. Rated high severity (CVSS 8.8), this vulnerability is remotely exploi

CVE-2023-50256 HIGH POC
7.5 Jan 03

Froxlor is open source server administration software. Rated high severity (CVSS 7.5), this vulnerability is remotely ex

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