Vulnerability in Shirasagi
CVE-2023-41889
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (51.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001
Affected products
- Shirasagi — versions < 1.18.0
- Ss-Proj Shirasagi
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/shirasagi/shirasagi/security/advisories/GHSA-xr45-c2jv-2v9r (Exploit, Mitigation, Vendor Advisory)
- github.com/shirasagi/shirasagi/blob/f249ce3f06f6bfbc0017b38f5c13de424334c3ea/ap… (Product)
- sim4n6.beehiiv.com/p/unicode-characters-bypass-security-checks (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-41889?
- CVE-2023-41889 is a medium-severity vulnerability in Shirasagi, classified under CWE-176. CVSS score: 5.3/10. Published 2023-09-15.
- How severe is CVE-2023-41889?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-41889 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.