CVE-2023-36492Network attack vector

Script execution via unvalidated calendar return link

Published Sep 5, 2023 · Updated Sep 30, 2024

Reflected XSS in SHIRASAGI before 1.18.0 allows remote attackers to execute scripts in a logged-in user's browser through a crafted URL. The calendar return link accepts the calendar[path] query parameter as a javascript URL and places it in the button destination without restricting the scheme. Execution requires a logged-in user to follow the crafted URL and select Return to Calendar, after which the script runs in that user's browser context.

CVSS severity6.1
Medium
EPSS probability0.51%
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 SHIRASAGI before 1.18.0 allows remote attackers to execute scripts in a logged-in user's browser through a crafted URL. The calendar return link accepts the calendar[path] query parameter as a javascript URL and places it in the button destination without restricting the scheme. Execution requires a logged-in user to follow the crafted URL and select Return to Calendar, after which the script runs in that user's browser context.

The record

CVE
CVE-2023-36492
Published
Sep 5, 2023
Updated
Sep 30, 2024
Vendor
SHIRASAGI Project
Product
SHIRASAGI
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record 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=prior to v1.18.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SHIRASAGI Project · SHIRASAGIversion=prior to v1.18.0

Published CVSS scores

6.1JPCERT/CC and IPACVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.6JPCERT/CC and IPAAV:N/AC:H/Au:N/C:N/I:P/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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