Japan Science and Technology Agency Miraikan Assist App Android WebView cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.5$0-$5k1.33-

Summaryinfo

A vulnerability was found in Japan Science and Technology Agency Miraikan Assist App Android and Miraikan Assist App iOS. It has been rated as problematic. This impacts an unknown function of the component WebView. This manipulation causes cross site scripting. This vulnerability is handled as CVE-2026-73537. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Japan Science and Technology Agency Miraikan Assist App Android and Miraikan Assist App iOS (version unknown) and classified as problematic. Affected by this vulnerability is an unknown function of the component WebView. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

Cross-site scripting vulnerability exists in Miraikan Assist App. If this vulnerability is exploited, an arbitrary script may be executed in the browser component (WebView) running on the affected product, resulting in the displayed content being altered.

It is possible to read the advisory at miraikan.jst.go.jp. This vulnerability is known as CVE-2026-73537 since 08/18/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.7
CNA Vector (jpcert): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/18/2026 CVE reserved
08/21/2026 +3 days Advisory disclosed
08/21/2026 +0 days VulDB entry created
08/21/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: miraikan.jst.go.jp
Status: Not defined

CVE: CVE-2026-73537 (🔒)
GCVE (CVE): GCVE-0-2026-73537
GCVE (VulDB): GCVE-100-394051

Entryinfo

Created: 08/21/2026 09:55
Changes: 08/21/2026 09:55 (72)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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