VulnerabilityPublished 3 Jul 2025

CVE-2025-27455: Endress+Hauser MEAC300-FNADE4 · Clickjacking

Affects Endress+Hauser MEAC300-FNADE4Source CVE Database V5

Not known to be exploited · CVSS 4.3 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

4.3Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

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

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: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
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: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Jul 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
Endress+Hauser Endress+Hauser MEAC300-FNADE4	Affected =0	Fixed in–

AI-suggested

To mitigate this vulnerability, European organizations should implement the following specific measures: 1) Employ X-Frame-Options or Content Security Policy (CSP) frame-ancestors directives on web servers hosting the MEAC300-FNADE4 web interface to prevent framing by unauthorized domains. 2) Conduct thorough security assessments of the device's web interface configuration to ensure no legacy or insecure settings allow framing. 3) Educate users and operators about the risks of clickjacking and encourage vigilance when interacting with web-based control interfaces. 4) Isolate the device's management interfaces within secure network segments and restrict access to trusted personnel only. 5) Monitor network traffic and user activity logs for unusual patterns that may indicate attempted clickjacking or social engineering attacks. 6) Engage with Endress+Hauser support channels to request official patches or firmware updates addressing this vulnerability as they become available. 7) Consider deploying web application firewalls (WAF) or reverse proxies that can enforce anti-framing policies and detect suspicious framing attempts. These targeted actions go beyond generic advice by focusing on the specific nature of the vulnerability and the operational context of the affected product.

Description

The web application is vulnerable to clickjacking attacks. The site can be embedded into another frame, allowing an attacker to trick a user into clicking on something different from what the user perceives, thus potentially revealing confidential information or allowing others to take control of their computer while clicking on seemingly innocuous objects.

Impact

For European organizations, particularly those in industrial sectors such as manufacturing, energy, water treatment, and chemical processing, the impact of this vulnerability could be substantial. Endress+Hauser devices are widely used in European industrial automation environments. Successful exploitation could lead to unauthorized manipulation of control systems through deceptive user interactions, risking operational integrity and safety. While the vulnerability does not directly compromise confidentiality or availability, the integrity of control commands and user actions is at risk, which in industrial contexts can translate into physical process disruptions or safety hazards. European organizations operating critical infrastructure or industrial plants using the MEAC300-FNADE4 device may face increased operational risks, regulatory scrutiny, and potential financial losses if attackers leverage this vulnerability to cause process anomalies or safety incidents.

Summary

CVE-2025-27455 is a medium-severity vulnerability affecting the Endress+Hauser MEAC300-FNADE4 web application. The vulnerability is classified under CWE-1021, which pertains to improper restriction of rendered UI layers or frames, commonly known as a clickjacking vulnerability. This security flaw allows an attacker to embed the vulnerable web application within a maliciously crafted iframe or frame on another website. By doing so, the attacker can trick users into interacting with the embedded application unknowingly, potentially causing them to perform unintended actions. Although the CVSS vector indicates no direct impact on confidentiality or availability, the integrity of user interactions is compromised. The vulnerability requires no privileges (PR:N) but does require user interaction (UI:R), and it can be exploited remotely over the network (AV:N). The affected product, Endress+Hauser MEAC300-FNADE4, is an industrial control system component used in process automation and monitoring. The absence of patches or known exploits in the wild suggests that the vulnerability is newly disclosed and may not yet be actively exploited. However, the risk remains significant in environments where this device is deployed, especially in critical infrastructure sectors. The vulnerability could enable attackers to manipulate user actions, potentially leading to unauthorized control commands or disclosure of sensitive operational information if users are tricked into clicking on malicious overlays or controls.

CWE-1021Improper Restriction of Rendered UI Layers or Frames (opens in a new tab)
Base weaknessOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain.
Implementation
The use of X-Frame-Options allows developers of web content to restrict the usage of their application within the form of overlays, frames, or iFrames. The developer can indicate from which domains can frame the content.
Implementation
A developer can use a "frame-breaker" script in each page that should not be framed. This is very helpful for legacy browsers that do not support X-Frame-Options security feature previously mentioned.
Implementation
This defense-in-depth technique can be used to prevent the improper usage of frames in web applications. It prioritizes the valid sources of data to be loaded into the application through the usage of declarative policies.
OWASP Cheat Sheets
Content Security Policy (opens in a new tab)
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V14.4.3 (opens in a new tab)
V14.4.7 (opens in a new tab)
Attack patterns
Clickjacking (opens in a new tab)
Flash File Overlay (opens in a new tab)
iFrame Overlay (opens in a new tab)
Task Impersonation (opens in a new tab)
Tapjacking (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

Affected software

Description

AI analysisMachine-generated, updated 3 Jul 2025, 11:58 UTC

WeaknessesCWE-1021

Technical details

References

Community reviews

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