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.
References (3)
Core 3
Core References
Exploit, Mitigation, Vendor Advisory x_refsource_confirm
https://github.com/shirasagi/shirasagi/security/advisories/GHSA-xr45-c2jv-2v9r
Product x_refsource_misc
https://github.com/shirasagi/shirasagi/blob/f249ce3f06f6bfbc0017b38f5c13de424334c3ea/app/models/concerns/rdf/object.rb#L68-L72
Exploit, Third Party Advisory x_refsource_misc
https://sim4n6.beehiiv.com/p/unicode-characters-bypass-security-checks
Scores
CVSS v3
5.3
EPSS
0.0058
EPSS Percentile
43.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-116
CWE-176
Status
published
Products (1)
ss-proj/shirasagi
< 1.18.0
Published
Sep 15, 2023
Tracked Since
Feb 18, 2026