What is CVE-2023-33177?

CVE-2023-33177 is a high-severity vulnerability in Xibosignage Xibo, classified under Path Traversal. CVSS score: 8.8/10. Published 2023-05-30.

How severe is CVE-2023-33177?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2023-33177 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Xibosignage Xibo

CVE-2023-33177

Xibo is a content management system (CMS). A path traversal vulnerability exists in the Xibo CMS whereby a specially crafted zip file can be uploaded to the CMS via the layout import function by an authenticated user which would allow creation of files outside of the CMS library directory as the webserver user. This can be used to upload a PHP webshell inside the web root directory and achieve remote code execution as the webserver user. Users should upgrade to version 2.3.17 or 3.3.5, which fix this issue. Customers who host their CMS with Xibo Signage have already received an upgrade or patch to resolve this issue regardless of the CMS version that they are running.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2023-05-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.070 (94.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.071 · newest: 0.070 · change: -0.001

Affected products

Xibosignage Xibo
Xibosignage Xibo-Cms — versions >= 1.8.0, < 2.3.17, >= 3.0.0, < 3.3.5

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

References

github.com/xibosignage/xibo-cms/security/advisories/GHSA-jj27-x85q-crqv (Patch, Vendor Advisory)
github.com/xibosignage/xibo-cms/commit/1cbba380fa751a00756e70d7b08b5c6646092658 (Patch)
github.com/xibosignage/xibo-cms/commit/45c6b53c3978639db03b63270a56f4397f49b2c9 (Patch)
claroty.com/team82/disclosure-dashboard (Third Party Advisory)
xibosignage.com/blog/security-advisory-2023-05/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-33177?: CVE-2023-33177 is a high-severity vulnerability in Xibosignage Xibo, classified under Path Traversal. CVSS score: 8.8/10. Published 2023-05-30.
How severe is CVE-2023-33177?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2023-33177 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.