CVE-2023-33177

Name: CVE-2023-33177
Creator: NVD / NIST
Published: 2023-05-30T20:15:10.837+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 7.09%

Last modified Jun 17, 2026

CVE-2023-33177 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 7.09% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

7.09%

93.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Xibosignage	Xibo	>= 1.8.0, < 2.3.17
Xibosignage	Xibo	>= 3.0.0, < 3.3.5

References

https://claroty.com/team82/disclosure-dashboardThird Party Advisory
https://github.com/xibosignage/xibo-cms/commit/1cbba380fa751a00756e70d7b08b5c6646092658Patch
https://github.com/xibosignage/xibo-cms/commit/45c6b53c3978639db03b63270a56f4397f49b2c9Patch
https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-jj27-x85q-crqvPatch, Vendor Advisory
https://xibosignage.com/blog/security-advisory-2023-05/Vendor Advisory
https://claroty.com/team82/disclosure-dashboardThird Party Advisory
https://github.com/xibosignage/xibo-cms/commit/1cbba380fa751a00756e70d7b08b5c6646092658Patch
https://github.com/xibosignage/xibo-cms/commit/45c6b53c3978639db03b63270a56f4397f49b2c9Patch
https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-jj27-x85q-crqvPatch, Vendor Advisory
https://xibosignage.com/blog/security-advisory-2023-05/Vendor Advisory

Timeline

Published: May 30, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-33177?

How severe is CVE-2023-33177?

CVE-2023-33177 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 7.09% probability of exploitation in the next 30 days.

How do I fix CVE-2023-33177?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-33177?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST