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CVE-2026-73827

Quick assessment

Affected
Tsuyoshi Saito SOY Calendar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SOY Calendar是日本SOY公司的一款团队协作日历软件。 SOY Calendar 2.4.0及之前版本存在跨站脚本漏洞，该漏洞源于跨站脚本漏洞，可能导致登录产品的用户在Web浏览器上执行任意脚本。

CVSS 4.8 · Medium EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
Tsuyoshi Saito SOY Calendar ≤ 2.4.0 affected
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I. Basic Information for CVE-2026-73827

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
SOY Calendar 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SOY Calendar是日本SOY公司的一款团队协作日历软件。 SOY Calendar 2.4.0及之前版本存在跨站脚本漏洞，该漏洞源于跨站脚本漏洞，可能导致登录产品的用户在Web浏览器上执行任意脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tsuyoshi Saito SOY Calendar 0 ~ 2.4.0 -

II. Public POCs for CVE-2026-73827

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-73827

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Vendor Advisories for CVE-2026-73827 (1)

Vendor Pages for CVE-2026-73827 (1)

Same Patch Batch · Tsuyoshi Saito · 2026-08-28 · 4 CVEs total

CVE-2026-78032 9.3 CRITICAL SOY CMS 反序列化注入漏洞
CVE-2026-77838 4.8 MEDIUM SOY Calendar 跨站脚本漏洞
CVE-2026-78238 4.8 MEDIUM SOY Gallery 跨站脚本漏洞

IV. Related Vulnerabilities

Same product: SOY Calendar
Same vendor: Tsuyoshi Saito
Same weakness: CWE-79