What’s Vulnerable › Vulnerabilities

CVE-2020-4061: Cross-site Scripting in OctoberPotential self-XSS when pasting content from malicious websites

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-07-02 · updated 2026-06-17
• Weakness: CWE-79

Description

In October from version 1.0.319 and before version 1.0.467, pasting content copied from malicious websites into the Froala richeditor could result in a successful self-XSS attack. This has been fixed in 1.0.467.

Affected products

• octobercms october: from 1.0.319 before 1.0.467 — fixed in 1.0.467

How to fix

Upgrade to a fixed version: octobercms october 1.0.467. Check the vendor advisory for mitigations.

References

• https://github.com/octobercms/october/commit/b384954a29b89117e1c0d6035b3ede4f46df67c5
• https://github.com/octobercms/october/security/advisories/GHSA-3pc2-fm7p-q2vg
• https://research.securitum.com/the-curious-case-of-copy-paste/
• https://github.com/octobercms/october/commit/b384954a29b89117e1c0d6035b3ede4f46df67c5
• https://github.com/octobercms/october/security/advisories/GHSA-3pc2-fm7p-q2vg
• https://research.securitum.com/the-curious-case-of-copy-paste/

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