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Frappe HRMS EUVDEUVD-2026-115864

| CVE-2026-121442 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-11-03 VulnCheck GHSA-8r3g-54rx-668x
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-privilege employee
  2. Delivery
    Query Expense Claim Advances API
  3. Exploit
    Authorization check bypassed
  4. Execution
    Retrieve other employees' expense advance records
  5. Impact
    Harvest sensitive financial data

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Object-level authorization, IDOR prevention
Exploitation Conditions

Exploitation requires an authenticated Frappe HRMS account (PR:L) with access to the Expense Claim Advances API; the attacker queries that specific API endpoint and, because of the missing authorization check, receives expense advance records owned by other employees. This affects Frappe HRMS versions before 15.61.0. The primary limiting factor is the authentication requirement - the attacker must already be a valid employee user (or possess valid employee credentials), so this is not remotely exploitable by an anonymous attacker. No special non-default configuration or user interaction is required (UI:N); impact is confined to read access to other employees' expense advance financial data (no integrity or availability impact).

Impact

This is a moderate-severity information-disclosure issue, not an emergency. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) and the 5.3 score indicate a network-reachable flaw that is low-complexity to trigger but requires authentication (PR:L), and whose impact is limited to confidentiality (VC:L with VI:N/VA:N) - an authenticated employee reading other employees' expense advance records via the Expense Claim Advances API. No EPSS score was supplied, the CVE is not in CISA KEV, and no public exploit was provided in the input, so there is no_public exploit identified at time of analysis and no evidence of active exploitation. The vuln.today decision label is 'this_month', which is consistent with a confirmed-but-low-urgency authorization flaw: real and worth patching, but not an act_now/emergency priority. The key limiting factor is that exploitation requires a valid authenticated HRMS employee account, so the realistic threat is an insider or a holder of compromised employee credentials rather than an anonymous internet attacker. Missing signals: no EPSS and no independent corroboration of exploitation - absence here is expected for a newly reported low-urgency bug and is not itself a red flag.

Exploit ScenarioDerived

An authenticated employee (or an attacker using stolen employee credentials) logs into a Frappe HRMS instance and issues queries to the Expense Claim Advances API. Because authorization checks are improperly enforced, the API returns expense advance records belonging to other employees, exposing their sensitive financial details. No public exploit code was identified in the sources, but the attack is low-complexity once authenticated.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available

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AnalysisAIv1 – Nov 03, 2026

Frappe HRMS before 15.61.0 allows any authenticated employee to read other employees' expense advance records by querying the Expense Claim Advances API, which fails to enforce ownership-based authorization (CWE-639). The exposure is limited to read access of sensitive financial data belonging to coworkers; there is no integrity or availability impact and an attacker must already hold valid employee credentials on the instance. A public advisory exists, no public exploit code has been identified at time of analysis, and this is tracked as a moderate-severity information-disclosure issue rather than an emergency.

RemediationAI

Upgrade Frappe HRMS to 15.61.0 or later, which is the version listed as the fix in the vendor advisory (https://github.com/frappe/hrms/security/advisories/GHSA-9f7p-ppw4-57p6); the vendor-released patch is 15.61.0. The advisory explicitly states that no workaround exists and that updating to the patched version is the recommended and only complete fix, so remediation planning should center on scheduling the upgrade rather than on configuration-level containment. Because exploitation requires a valid authenticated employee account, the exposure window can be narrowed by auditing who holds HRMS user accounts and by reviewing expense advance records for unexpected cross-employee access until the upgrade is applied.

Affected VersionsENISA

hrms 0 <15.61.0

Affected Packages

euvd hrms fix: 15.61.0

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

Frappe HRMS is the HR and expense management application built on the Frappe framework, which exposes server-side methods as REST-style API endpoints and typically applies role- and document-level permission checks before returning records. CWE-639 (Authorization Bypass Through User-Controlled Key) describes the root-cause class here: a request to the Expense Claim Advances API supplies an identifier or filter that selects expense advance records, and the endpoint returns those records without verifying that the requesting employee owns them or holds a permission level that covers them. Successful requests therefore leak names, amounts and related financial details from other employees' expense advances. CVSS 4.0 rates this 5.3 with a network attack vector and low privileges required (PR:L per the assessed CVSS:3.1/AV:N/AC:L/PR:L/UI:N vector), so the practical barrier is possession of a valid employee account rather than any anonymous remote path; no special non-default configuration or user interaction is needed, and the flaw is confined to confidentiality. The precise request parameters and code path that trigger the missing check are not described in the available 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 by any authenticated low-privilege employee (PR:L), low complexity, confidentiality-only impact limited to other users' financial records (C:L, I:N, A:N), no scope change.

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

Lifecycle Timeline

1
Patch available
Nov 03, 2026 - 16:17 EUVD

DescriptionCVE.org

Frappe HRMS before 15.61.0 contains a permission bypass vulnerability that allows authenticated employees to view other employees' expense advance details due to improper authorization checks. Attackers can query the Expense Claim Advances API to retrieve expense advance records belonging to other employees, exposing sensitive financial information.

Threat Intelligence Overview

Prevalence
Low
niche open-source HR module within the Frappe/ERPNext ecosystem
Social Media
1
Sightings
Data Quality
4 sources
Confidence: Medium

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 N/A
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· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

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.

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