What is CVE-2023-1147?

CVE-2023-1147 is a medium-severity vulnerability in Flatpress, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-03-02.

How severe is CVE-2023-1147?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Flatpress

CVE-2023-1147

Cross-site Scripting (XSS) - Stored in GitHub repository flatpressblog/flatpress prior to 1.3.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Flatpress
Flatpressblog Flatpressblog/flatpress — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

huntr.dev/bounties/187f5353-f866-4d26-a5ba-fca378520020 (Exploit, Patch, Third Party Advisory)
github.com/flatpressblog/flatpress/commit/264217f318a8852c4f3e34350d4a0e1363cdd… (Patch)

Frequently asked questions

What is CVE-2023-1147?: CVE-2023-1147 is a medium-severity vulnerability in Flatpress, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-03-02.
How severe is CVE-2023-1147?: Medium severity. CVSS v3 base score is 5.4 out of 10.