CVE-2025-5377Public exploitNetwork attack vector

Reflected XSS via unencoded Zoom parameter

Published May 31, 2025 · Updated Jun 2, 2025

Reflected XSS in historic1.asp in Astun Technology iShare Maps 5.4.0 allows remote attackers to execute script via the Zoom parameter. The page returns the supplied Zoom value in generated HTML without adequate output encoding, causing crafted markup to execute in the visitor's browser. Exploitation requires a user to open an attacker-crafted URL; the script runs in the iShare Maps origin and can alter page content or access origin-readable data.

CVSS severity6.1
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in historic1.asp in Astun Technology iShare Maps 5.4.0 allows remote attackers to execute script via the Zoom parameter. The page returns the supplied Zoom value in generated HTML without adequate output encoding, causing crafted markup to execute in the visitor's browser. Exploitation requires a user to open an attacker-crafted URL; the script runs in the iShare Maps origin and can alter page content or access origin-readable data.

The record

CVE
CVE-2025-5377
Published
May 31, 2025
Updated
Jun 2, 2025
Vendor
Astun Technology
Product
iShare Maps
Classifications
CWE-94, CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Astun Technology · iShare Mapsversion=5.4.0

Published CVSS scores

4.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
5.0VulDB CNAAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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