CVE-2023-41889

Name: CVE-2023-41889
Creator: NVD / NIST
Published: 2023-09-15T21:15:11.503+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2023-41889 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.58%

43.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Ss-Proj	Shirasagi	< 1.18.0

References

https://github.com/shirasagi/shirasagi/blob/f249ce3f06f6bfbc0017b38f5c13de424334c3ea/app/models/concerns/rdf/object.rb#L68-L72Product
https://github.com/shirasagi/shirasagi/security/advisories/GHSA-xr45-c2jv-2v9rExploit, Mitigation, Vendor Advisory
https://sim4n6.beehiiv.com/p/unicode-characters-bypass-security-checksExploit, Third Party Advisory
https://github.com/shirasagi/shirasagi/blob/f249ce3f06f6bfbc0017b38f5c13de424334c3ea/app/models/concerns/rdf/object.rb#L68-L72Product
https://github.com/shirasagi/shirasagi/security/advisories/GHSA-xr45-c2jv-2v9rExploit, Mitigation, Vendor Advisory
https://sim4n6.beehiiv.com/p/unicode-characters-bypass-security-checksExploit, Third Party Advisory

Timeline

Published: Sep 15, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-41889?

How severe is CVE-2023-41889?

CVE-2023-41889 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2023-41889?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-41889?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST