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CVE-2023-41889— Late-Unicode normalization vulnerability in SHIRASAGI

Quick assessment

Affected

shirasagi shirasagi

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.

SHIRASAGI是日本Shirasagi项目的一套内容管理系统（CMS）。 SHIRASAGI 存在安全漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。

CVSS 5.3 · Medium EPSS 0.71% · P53 Updated Jan 25, 2025

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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I. Basic Information for CVE-2023-41889

Vulnerability Information

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Vulnerability Title

Late-Unicode normalization vulnerability in SHIRASAGI

Source: CVE Program / CVE List V5

Vulnerability Description

SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. This happens when a logical validation or a security check is performed before a Unicode normalization. The Unicode character equivalent of a character would resurface after the normalization. The fix is initially performing the Unicode normalization and then strip for all whitespaces and then checking for a blank string. This issue has been fixed in version 1.18.0.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

Unicode编码处理不恰当

Source: CVE Program / CVE List V5

Vulnerability Title

SHIRASAGI 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

SHIRASAGI是日本Shirasagi项目的一套内容管理系统（CMS）。 SHIRASAGI 存在安全漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。

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
shirasagi	shirasagi	< 1.18.0	-

II. Public POCs for CVE-2023-41889

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2023-41889

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Vendor Advisories for CVE-2023-41889 (1)

https://github.com/shirasagi/shirasagi/security/advisories/GHSA-xr45-c2jv-2v9r x_refsource_CONFIRM

Other References for CVE-2023-41889 (2)

https://sim4n6.beehiiv.com/p/unicode-characters-bypass-security-checks x_refsource_MISC
https://github.com/shirasagi/shirasagi/blob/f249ce3f06f6bfbc0017b38f5c13de424334c3ea/app/models/concerns/rdf/object.rb#L68-L72 x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2023-41889

IV. Related Vulnerabilities

Same product: shirasagi

Same weakness: CWE-176