SOY Calendar contains a cross-site scripting vulnerability. An arbitrary script may be executed on the web browser of the user who is logging in to the product.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00169.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Tsuyoshi Saito SOY Calendar unaffected
Version Status Constraints
o affected ≤ 2.4.0

No data.

No data.

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Vendors Products
Saitodev Subscribe
Soy Calendar Subscribe

Project Subscriptions

Vendors Products
Saitodev Subscribe
Soy Calendar Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://jvn.jp/en/jp/JVN04485476/ cve-icon cve-icon
https://saitodev.co/article/7105 cve-icon cve-icon
History

Fri, 28 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Saitodev
Saitodev soy Calendar
Vendors & Products Saitodev
Saitodev soy Calendar

Fri, 28 Aug 2026 15:15:00 +0000

Type Values Removed Values Added
Title Cross‑Site Scripting in SOY Calendar Allows Arbitrary Script Execution for Authenticated Users

Fri, 28 Aug 2026 07:30:00 +0000

Type Values Removed Values Added
Description SOY Calendar contains a cross-site scripting vulnerability. An arbitrary script may be executed on the web browser of the user who is logging in to the product.
Weaknesses CWE-79
References
Metrics cvssV3_0

{'score': 5.4, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: jpcert

Published:

Updated: 2026-08-28T06:10:58.005Z

Reserved: 2026-08-24T04:26:29.600Z

Link: CVE-2026-77838

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-08-28T08:16:41.680

Modified: 2026-08-28T16:09:10.947

Link: CVE-2026-77838

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T16:12:51Z

Weaknesses