CVE-2025-56424VulnerabilityPublished 8 Jan 2026

CVE-2025-56424: n/a

Source CVE Database V5

Not known to be exploited · CVSS 7.5 High.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

7.5High

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

EPSS: 0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

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

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, 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: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Jan 2026
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 2026-10-26.

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 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

AI-suggested

Organizations should prioritize applying the official Service Pack 2 update from Insiders Technologies GmbH as soon as it becomes available to remediate this vulnerability. Until then, network administrators should implement intrusion detection and prevention systems (IDS/IPS) to monitor and block suspicious scripts targeting the e-invoice pro application. Rate limiting and traffic anomaly detection can help mitigate resource exhaustion attempts. Restricting access to the e-invoicing service to trusted IP ranges or VPNs can reduce exposure. Regularly reviewing application logs for unusual script submissions and conducting penetration testing focused on resource exhaustion scenarios will aid in early detection. Additionally, organizations should ensure robust backup and recovery procedures to minimize downtime impact in case of successful DoS attacks.

Description

CVE-2025-56424 is a high-severity denial of service vulnerability in Insiders Technologies GmbH e-invoice pro before release 1 Service Pack 2. It allows a remote attacker to cause a denial of service by sending a crafted script without requiring authentication or user interaction. The vulnerability is related to resource exhaustion (CWE-400) and affects availability only. No known exploits are currently in the wild. European organizations using this e-invoicing software may face service disruptions impacting business operations. Mitigation involves applying the forthcoming Service Pack 2 update once available and implementing network-level protections to detect and block malicious scripts. Countries with significant adoption of this software and critical e-invoicing infrastructure, such as Germany and Austria, are most likely to be affected. Given the ease of exploitation and impact on availability, the severity is assessed as high.

Impact

For European organizations, especially those relying on Insiders Technologies GmbH e-invoice pro software, this vulnerability poses a risk of service outages due to denial of service attacks. Disruption of e-invoicing can delay financial transactions, affect cash flow, and impair compliance with tax and regulatory reporting requirements. Industries with high volumes of electronic invoicing, such as manufacturing, retail, and logistics, may experience operational delays. Public sector entities and financial institutions using this software might face increased risk of service unavailability, impacting citizen services and financial operations. The ease of remote exploitation without authentication increases the threat landscape, potentially allowing attackers to disrupt multiple organizations simultaneously. Although no data confidentiality or integrity is compromised, the availability impact alone can cause significant operational and reputational damage.

Summary

CVE-2025-56424 is a vulnerability identified in Insiders Technologies GmbH's e-invoice pro software versions prior to release 1 Service Pack 2. The flaw allows a remote attacker to cause a denial of service (DoS) condition by submitting a specially crafted script to the application. This vulnerability is classified under CWE-400, which pertains to uncontrolled resource consumption leading to service disruption. The attack vector is network-based (AV:N), requires no privileges (PR:N), and no user interaction (UI:N), making exploitation straightforward for an unauthenticated attacker. The vulnerability impacts availability (A:H) but does not affect confidentiality or integrity. The absence of known exploits in the wild suggests it has not yet been weaponized, but the high CVSS score of 7.5 indicates significant risk if exploited. The lack of a patch at the time of publication means organizations must rely on interim mitigations until Service Pack 2 is released. The vulnerability could disrupt e-invoicing services, potentially halting invoice processing and impacting business continuity.

CWE-400Uncontrolled Resource Consumption (opens in a new tab)
Class weaknessLikelihood of exploit: High
The product does not properly control the allocation and maintenance of a limited resource.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place.
Architecture and Design
Mitigation of resource exhaustion attacks requires that the target system either: recognizes the attack and denies that user further access for a given amount of time, or; uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Architecture and Design
Ensure that protocols have specific limits of scale placed on them.
OWASP Cheat Sheets
File Upload (opens in a new tab)
OWASP ASVS 4.0.3
V12.1.1 (opens in a new tab)
Attack patterns
XML Ping of the Death (opens in a new tab)
Regular Expression Exponential Blowup (opens in a new tab)
Sustained Client Engagement (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 15 Jan 2026, 19:50 UTC

WeaknessesCWE-400

Technical details

References

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