CVE-2018-1000813

Severity: medium (CVSS 4.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-20 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

BackdropCMS Backdrop: through 1.11.0

References

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

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