CVE-2018-1000813

Name: CVE-2018-1000813
Creator: NVD / NIST
Published: 2018-12-20T15:29:00.44+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.74%

Last modified Jun 17, 2026

CVE-2018-1000813 is a vulnerability of currently unknown severity. Backdrop CMS version 1.11.0 and earlier contains a Cross Site Scripting (XSS) vulnerability in Sanitization of custom class names used on blocks and layouts. that can result in Execution of JavaScript from an unexpected source.. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

Backdrop CMS version 1.11.0 and earlier contains a Cross Site Scripting (XSS) vulnerability in Sanitization of custom class names used on blocks and layouts. that can result in Execution of JavaScript from an unexpected source.. This attack appear to be exploitable via A user must be directed to an affected page while logged in.. This vulnerability appears to have been fixed in 1.11.1 and later.

Metrics

EPSS Probability

0.74%

49.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Backdropcms	Backdrop Cms	<= 1.11.0

References

https://backdropcms.org/security/backdrop-sa-core-2018-005Vendor Advisory
https://backdropcms.org/security/backdrop-sa-core-2018-005Vendor Advisory

Timeline

Published: Dec 20, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1000813?

How severe is CVE-2018-1000813?

Severity scoring for CVE-2018-1000813 is pending analysis. The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000813?

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-2018-1000813?

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

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Source: NVD / NIST