Sanitize is an allowlist-based HTML and CSS sanitizer. Using carefully crafted input, an attacker may be able to sneak arbitrary HTML and CSS through Sanitize starting with version 3.0.0 and prior to version 6.0.2 when Sanitize is configured to use the built-in "relaxed" config or when using a custom config that allows `style` elements and one or more CSS at-rules. This could result in cross-site scripting or other undesired behavior when the malicious HTML and CSS are rendered in a browser. Sanitize 6.0.2 performs additional escaping of CSS in `style` element content, which fixes this issue. Users who are unable to upgrade can prevent this issue by using a Sanitize config that doesn't allow `style` elements, using a Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence `</` as `<\/` in `style` element content.

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6748-1 advisory.

    It was discovered that Sanitize incorrectly handled noscript elements under certain circumstances. An     attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only     affected Ubuntu 22.04 LTS. (CVE-2023-23627)

    It was discovered that Sanitize incorrectly handled style elements under certain circumstances. An     attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. (CVE-2023-36823)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 / 12 host has a package installed that is affected by a vulnerability as referenced in the dsa-5616 advisory.

  - Sanitize is an allowlist-based HTML and CSS sanitizer. Using carefully crafted input, an attacker may be     able to sneak arbitrary HTML and CSS through Sanitize starting with version 3.0.0 and prior to version     6.0.2 when Sanitize is configured to use the built-in relaxed config or when using a custom config that     allows `style` elements and one or more CSS at-rules. This could result in cross-site scripting or other     undesired behavior when the malicious HTML and CSS are rendered in a browser. Sanitize 6.0.2 performs     additional escaping of CSS in `style` element content, which fixes this issue. Users who are unable to     upgrade can prevent this issue by using a Sanitize config that doesn't allow `style` elements, using a     Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence `</` as     `<\/` in `style` element content. (CVE-2023-36823)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has a package installed that is affected by a vulnerability as referenced in the dla-3652 advisory.

  - Sanitize is an allowlist-based HTML and CSS sanitizer. Using carefully crafted input, an attacker may be     able to sneak arbitrary HTML and CSS through Sanitize starting with version 3.0.0 and prior to version     6.0.2 when Sanitize is configured to use the built-in relaxed config or when using a custom config that     allows `style` elements and one or more CSS at-rules. This could result in cross-site scripting or other     undesired behavior when the malicious HTML and CSS are rendered in a browser. Sanitize 6.0.2 performs     additional escaping of CSS in `style` element content, which fixes this issue. Users who are unable to     upgrade can prevent this issue by using a Sanitize config that doesn't allow `style` elements, using a     Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence `</` as     `<\/` in `style` element content. (CVE-2023-36823)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
193803	Ubuntu 20.04 LTS / 22.04 LTS / 23.10 : Sanitize vulnerabilities (USN-6748-1)	Nessus	Ubuntu Local Security Checks	medium
190002	Debian dsa-5616 : ruby-sanitize - security update	Nessus	Debian Local Security Checks	medium
185522	Debian DLA-3652-1 : ruby-sanitize - LTS security update	Nessus	Debian Local Security Checks	medium

Detections

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CVE-2023-36823

medium

Tenable Plugins

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medium

medium