VulnerabilityPublished 29 Aug 2025

CVE-2025-9619: E4 Sistemas Mercatus ERP · Improper Control of Resource Identifiers

Affects E4 Sistemas Mercatus ERPSource CVE Database V5

Not known to be exploited · CVSS 6.9 Medium.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 4.0 base score

6.9Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
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

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 29 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
E4 Sistemas Mercatus ERP	Affected =2.00.019	Fixed in–

AI-suggested

Given the lack of official patches, European organizations should implement compensating controls immediately. These include restricting network access to the affected ERP web service endpoints via firewalls or network segmentation, allowing only trusted internal IP ranges to communicate with /basico/webservice/imprimir-danfe/id/. Implement web application firewalls (WAFs) with custom rules to detect and block suspicious manipulation of resource identifiers targeting this endpoint. Conduct thorough access control reviews to ensure that ERP users have minimal necessary privileges and monitor logs for anomalous access patterns related to the printing service. If possible, disable or restrict the vulnerable web service functionality until a vendor patch is available. Organizations should also engage with E4 Sistemas for updates and monitor threat intelligence feeds for emerging exploits. Regular backups and incident response readiness are advisable to mitigate potential exploitation consequences.

Description

A security flaw has been discovered in E4 Sistemas Mercatus ERP 2.00.019. The affected element is an unknown function of the file /basico/webservice/imprimir-danfe/id/. Performing manipulation results in improper control of resource identifiers. It is possible to initiate the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations using Mercatus ERP 2.00.019, this vulnerability poses a risk of unauthorized access to sensitive business documents or data managed by the ERP system, particularly those related to invoicing or fiscal documents (as implied by 'danfe', a Brazilian electronic invoice document). Although the impact on confidentiality is rated low, unauthorized access could lead to exposure of sensitive financial or operational data, potentially facilitating fraud or data leakage. The lack of integrity and availability impact reduces the risk of system disruption, but data exposure alone can have regulatory and reputational consequences under GDPR and other European data protection laws. Since the vulnerability is remotely exploitable without authentication, attackers could leverage it to gain footholds or gather intelligence on business operations. The absence of vendor response and patches increases the window of exposure, necessitating proactive mitigation by affected organizations. The threat is more acute for companies with ERP deployments accessible from external networks or insufficiently segmented internal networks.

Summary

CVE-2025-9619 is a medium-severity vulnerability affecting E4 Sistemas Mercatus ERP version 2.00.019. The flaw arises from improper control of resource identifiers within an unspecified function located at the path /basico/webservice/imprimir-danfe/id/. This vulnerability allows an unauthenticated remote attacker to manipulate resource identifiers, potentially leading to unauthorized access or manipulation of resources within the ERP system. The vulnerability does not require any user interaction or privileges, and can be exploited over the network, increasing its risk profile. The CVSS 4.0 base score is 6.9, reflecting a medium severity primarily due to the lack of authentication and ease of remote exploitation, but limited impact on confidentiality, integrity, or availability (only a low impact on confidentiality). The vendor, E4 Sistemas, has not responded to disclosure attempts, and no patches or mitigations have been published yet. No known exploits are currently active in the wild. The vulnerability likely stems from insufficient validation or authorization checks on resource identifiers, which could allow attackers to access or manipulate documents or data related to the ERP’s document printing web service (imprimir-danfe).

References

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