CVE-2023-22427Public exploitNetwork attack vector

Stored script execution via unescaped theme CSS path

Published Feb 24, 2023 · Updated Mar 12, 2025

Stored XSS in SHIRASAGI 1.16.2 and earlier allows remote authenticated users to execute script in a visitor's browser. The theme renderer inserts an administrator-controlled CSS path into a link element through HTML-string concatenation without attribute escaping. Exploitation requires administrative access, publication of the crafted theme, and a visitor opening a page that uses it, exposing that browser session to attacker-controlled script.

CVSS severity4.8
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in SHIRASAGI 1.16.2 and earlier allows remote authenticated users to execute script in a visitor's browser. The theme renderer inserts an administrator-controlled CSS path into a link element through HTML-string concatenation without attribute escaping. Exploitation requires administrative access, publication of the crafted theme, and a visitor opening a page that uses it, exposing that browser session to attacker-controlled script.

The record

CVE
CVE-2023-22427
Published
Feb 24, 2023
Updated
Mar 12, 2025
Vendor
SHIRASAGI Project
Product
SHIRASAGI
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=v1.16.2 and earlier versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

SHIRASAGI Project · SHIRASAGIversion=v1.16.2 and earlier versions

Published CVSS scores

3.5JPCERT/CC and IPAAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8JPCERT/CC and IPACVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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