What is CVE-2023-33293?

CVE-2023-33293 is a medium-severity vulnerability in Kaiostech Kaios, classified under Exposure of Resource to Wrong Sphere. CVSS score: 5.3/10. Published 2023-05-22.

How severe is CVE-2023-33293?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Kaiostech Kaios

CVE-2023-33293

An issue was discovered in KaiOS 3.0 and 3.1. The binary /system/kaios/api-daemon exposes a local web server on *.localhost with subdomains for each installed applications, e.g., myapp.localhost. An attacker can make fetch requests to api-deamon to determine if a given app is installed and read the manifest.webmanifest contents, including the app version.

Published 2023-05-22 · last modified 2026-06-17.

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:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% 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: 0.006 · change: 0.000

Affected products

Kaiostech Kaios — versions 3.0, 3.1

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

References

kaios.dev/cve/1410290 (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2023-33293?: CVE-2023-33293 is a medium-severity vulnerability in Kaiostech Kaios, classified under Exposure of Resource to Wrong Sphere. CVSS score: 5.3/10. Published 2023-05-22.
How severe is CVE-2023-33293?: Medium severity. CVSS v3 base score is 5.3 out of 10.