CVE-2023-6708: XSS (CVSS 5.4)

Description

The SVG Support plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the SVG upload feature in all versions up to, and including, 2.5.7 due to insufficient input sanitization and output escaping, even when the 'Sanitize SVG while uploading' feature is enabled. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Note that successful exploitation of this vulnerability requires the administrator to allow author-level users to upload SVG files. As of 2.5.6, SVG sanitization can still be bypassed by supplying a content-type other than image/svg+xml.

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CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

References

Other References

https://plugins.trac.wordpress.org/browser/svg-support/trunk/functions/attachment.php#L235 https://plugins.trac.wordpress.org/browser/svg-support/trunk/svg-support.php#L110 https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3133760%40svg-support&new=3133760%40svg-support&sfp_email=&sfph_mail= https://wordpress.org/plugins/svg-support/ https://www.wordfence.com/threat-intel/vulnerabilities/id/72bcfd2a-6803-4073-8fa9-62bcf0a10571?source=cve https://plugins.trac.wordpress.org/browser/svg-support/trunk/functions/attachment.php#L235 https://plugins.trac.wordpress.org/browser/svg-support/trunk/svg-support.php#L110 https://wordpress.org/plugins/svg-support/ https://www.wordfence.com/threat-intel/vulnerabilities/id/72bcfd2a-6803-4073-8fa9-62bcf0a10571?source=cve

Frequently Asked Questions

What is CVE-2023-6708? +

The SVG Support plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the SVG upload feature in all versions up to, and including, 2.5.7 due to insufficient input sanitization and output escaping, even when the 'Sanitize SVG while uploading' feature is enabled. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Note that successful exploitation of this vulnerability requires the administrator to allow author-level users to upload SVG files. As of 2.5.6, SVG sanitization can still be bypassed by supplying a content-type other than image/svg+xml. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2023-6708? +

CVE-2023-6708 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2023-6708? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2023-6708