What is CVE-2023-22427?

CVE-2023-22427 is a medium-severity vulnerability in Shirasagi Project, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2023-02-24.

How severe is CVE-2023-22427?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Shirasagi Project

CVE-2023-22427

Stored cross-site scripting vulnerability in Theme switching function of SHIRASAGI v1.16.2 and earlier versions allows a remote attacker with an administrative privilege to inject an arbitrary script.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-02-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Shirasagi Project — versions v1.16.2 and earlier versions
Ss-Proj Shirasagi

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.ss-proj.org/ (Product)
github.com/shirasagi/shirasagi (Product)
www.ss-proj.org/support/938.html (Exploit, Vendor Advisory)
jvn.jp/en/jp/JVN18765463/ (Third Party Advisory)

Frequently asked questions

What is CVE-2023-22427?: CVE-2023-22427 is a medium-severity vulnerability in Shirasagi Project, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2023-02-24.
How severe is CVE-2023-22427?: Medium severity. CVSS v3 base score is 4.8 out of 10.