CVE-2025-11278VulnerabilityPublished 5 Oct 2025Updated 6 Oct 2025

CVE-2025-11278: AllStarLink Supermon · Cross Site Scripting

Affects AllStarLink SupermonSource CVE Database V5

Not known to be exploited · CVSS 5.3 Medium · end of life, no fix coming : replace or isolate AllStarLink Supermon; no fix will be released.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

5.3Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: None coming – the product is end of life

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

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

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: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system 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 to 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.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 5 Oct 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 2026-10-25.

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

No fix will be released: AllStarLink Supermon is end of life. Replace it, or isolate it from untrusted networks until you can.

Affected software

Product	Affected	Fixed in
AllStarLink Supermon	Affected =6.0 =6.1 =6.2	Fixed in–

AI-suggested

Given the absence of vendor patches, European organizations should implement compensating controls to mitigate CVE-2025-11278. These include: 1) Isolating AllStarLink Supermon servers from public networks using firewalls or VPNs to restrict access to trusted users only. 2) Employing web application firewalls (WAFs) with custom rules to detect and block XSS payloads targeting the AllMon2 interface. 3) Encouraging users to employ modern browsers with built-in XSS protection and disabling unnecessary scripting where feasible. 4) Monitoring logs and network traffic for suspicious activity indicative of attempted XSS exploitation. 5) Considering migration to alternative, actively maintained monitoring tools or newer versions if available. 6) Educating users about the risks of clicking untrusted links or executing scripts within the AllStarLink environment. 7) Regularly backing up configuration and data to enable recovery if compromise occurs. These targeted measures go beyond generic advice by focusing on network segmentation, user education, and proactive detection tailored to the specific legacy software environment.

Description

A security vulnerability has been detected in AllStarLink Supermon up to 6.2. This vulnerability affects unknown code of the component AllMon2. The manipulation leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.

Impact

For European organizations, the impact of CVE-2025-11278 depends on their use of AllStarLink Supermon software. Organizations involved in amateur radio, emergency communication networks, or hobbyist groups using this software may face risks of session hijacking, unauthorized actions, or data manipulation via XSS attacks. Although the vulnerability does not directly compromise system confidentiality or availability, it undermines the integrity of user sessions and could facilitate further social engineering or phishing attacks. The lack of vendor support and patches increases the risk exposure, as affected systems remain vulnerable indefinitely. Additionally, compromised nodes could be leveraged as pivot points for broader network attacks or misinformation campaigns, particularly in critical communication infrastructures. European entities relying on these systems without adequate isolation or monitoring may experience reputational damage or operational disruptions.

Summary

CVE-2025-11278 is a cross-site scripting (XSS) vulnerability identified in the AllMon2 component of AllStarLink Supermon versions 6.0, 6.1, and 6.2. This vulnerability allows remote attackers to inject malicious scripts into the web interface without requiring authentication, though user interaction is necessary to trigger the exploit. The vulnerability arises from insufficient input validation or output encoding in the affected component, enabling attackers to execute arbitrary JavaScript in the context of the victim's browser. This can lead to session hijacking, defacement, or redirection to malicious sites, impacting the integrity and user trust of the application. The product is no longer maintained or supported by the vendor, and no patches or mitigations have been released. The vulnerability was publicly disclosed on October 5, 2025, with a CVSS v4.0 base score of 5.3, indicating a medium severity level. No known exploits have been observed in the wild yet, but the public disclosure and lack of vendor response increase the risk of exploitation. The affected software is primarily used in amateur radio communities for monitoring and managing AllStarLink nodes, which may limit the scope but still presents a risk to organizations relying on this infrastructure.

References

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