CVE-2020-6802
MEDIUMCVSS 6.1/10EPSS 1.69%
Last modified
CVE-2020-6802 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.. EPSS estimates a 1.69% chance of exploitation in the next 30 days.
Description
In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Bleach | < 3.1.1 |
| Fedoraproject | Fedora | 30 |
| Fedoraproject | Fedora | 31 |
| Fedoraproject | Fedora | 32 |
References
- https://advisory.checkmarx.net/advisory/CX-2020-4276Exploit, Third Party Advisory
- https://github.com/mozilla/bleach/security/advisories/GHSA-q65m-pv3f-wr5rThird Party Advisory
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleachExploit, Third Party Advisory
- https://advisory.checkmarx.net/advisory/CX-2020-4276Exploit, Third Party Advisory
- https://github.com/mozilla/bleach/security/advisories/GHSA-q65m-pv3f-wr5rThird Party Advisory
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleachExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-6802?
In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.
How severe is CVE-2020-6802?
CVE-2020-6802 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.69% probability of exploitation in the next 30 days.
How do I fix CVE-2020-6802?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Are you affected by CVE-2020-6802?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST