What is CVE-2023-1148?

CVE-2023-1148 is a medium-severity vulnerability in Flatpress, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2023-03-02.

How severe is CVE-2023-1148?

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

XSS in Flatpress

CVE-2023-1148

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 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: 0.005 (42.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% 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/f0cc2c4b-fdf9-483b-9a83-4e0dfeb4dac7 (Exploit, Patch, Third Party Advisory)
github.com/flatpressblog/flatpress/commit/3a32aad0dec5df24c6576d7567d4f2eadbfc7… (Patch)

Frequently asked questions

What is CVE-2023-1148?: CVE-2023-1148 is a medium-severity vulnerability in Flatpress, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2023-03-02.
How severe is CVE-2023-1148?: Medium severity. CVSS v3 base score is 4.8 out of 10.