CVE-2025-5377VulnerabilityPublished 31 May 2025Updated 2 Jun 2025

CVE-2025-5377: Astun Technology iShare Maps · Cross Site Scripting

Affects Astun Technology iShare MapsSource CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 06:26 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 29% 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:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

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

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.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 31 May 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 2026-10-26.

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

Affected software

Product	Affected	Fixed in
Astun Technology iShare Maps	Affected =5.4.0	Fixed in–

AI-suggested

Given the lack of an official patch from Astun Technology, European organizations should implement several practical mitigations: 1) Employ Web Application Firewalls (WAFs) with custom rules to detect and block malicious payloads targeting the 'Zoom' parameter in the historic1.asp endpoint. 2) Implement strict input validation and output encoding at the application or proxy level to neutralize script injection attempts. 3) Use Content Security Policy (CSP) headers to restrict the execution of inline scripts and reduce the impact of XSS attacks. 4) Educate users about the risks of clicking on suspicious links and encourage cautious behavior when interacting with mapping services. 5) Monitor web server logs and application telemetry for unusual requests or error patterns related to the vulnerable parameter. 6) If feasible, isolate the iShare Maps application behind a VPN or restrict access to trusted users to reduce exposure. 7) Consider deploying a reverse proxy that sanitizes inputs or performs additional security checks. 8) Engage with Astun Technology for updates and consider alternative GIS solutions if the vendor remains unresponsive. These steps go beyond generic advice by focusing on compensating controls and user awareness in the absence of a vendor patch.

Description

A vulnerability was found in Astun Technology iShare Maps 5.4.0. It has been rated as problematic. Affected by this issue is some unknown functionality of the file historic1.asp. The manipulation of the argument Zoom leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations using Astun Technology's iShare Maps 5.4.0, this XSS vulnerability poses a risk primarily to the confidentiality and integrity of user data and sessions. Organizations relying on iShare Maps for geographic information system (GIS) services, especially those providing public or internal mapping services, could see attackers exploit this flaw to conduct phishing attacks, steal session cookies, or perform unauthorized actions on behalf of legitimate users. This could lead to data leakage or unauthorized access to sensitive mapping data or related services. Since the vulnerability requires user interaction, the risk is heightened in environments where users are less security-aware or where social engineering campaigns are prevalent. The absence of a patch and vendor response increases the window of exposure. Additionally, if iShare Maps is integrated with other critical systems or portals, the XSS could serve as a pivot point for further attacks. The impact on European organizations is also influenced by compliance requirements such as GDPR, where data breaches involving personal data could lead to regulatory penalties. Overall, while the vulnerability does not directly compromise system availability, the potential for data compromise and unauthorized actions makes it a significant concern for affected organizations.

Summary

CVE-2025-5377 is a cross-site scripting (XSS) vulnerability identified in Astun Technology's iShare Maps version 5.4.0. The vulnerability specifically affects the 'historic1.asp' file, where the 'Zoom' parameter can be manipulated by an attacker to inject malicious scripts. This vulnerability is classified as a reflected XSS, as the attack vector involves sending a crafted request with a malicious payload in the Zoom argument, which is then reflected back in the web application response without proper sanitization or encoding. The vulnerability can be exploited remotely without requiring authentication, making it accessible to any attacker who can reach the affected web interface. The CVSS v4.0 base score is 5.3, indicating a medium severity level. The attack requires user interaction, such as tricking a user into clicking a malicious link or visiting a crafted webpage that includes the exploit. The vendor was notified early but has not responded or provided a patch, and no known exploits have been observed in the wild yet. The lack of vendor response and patch availability increases the risk of exploitation as attackers may develop and share exploit code publicly. The vulnerability impacts the confidentiality and integrity of user sessions by potentially allowing attackers to execute arbitrary JavaScript in the context of the victim's browser, which can lead to session hijacking, credential theft, or unauthorized actions within the application. However, the vulnerability does not directly affect availability or require elevated privileges, limiting its overall impact to medium severity.

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What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Jul 2025, 13:28 UTC

Technical details

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