HighRed Hat & Ubuntu Linux
Remote Code Execution via persistent cross-site scripting
CVE-2021-47839 Published Jan 16, 2026
CVE-2021-47839
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Remote Code Execution via persistent cross-site scripting. Red Hat rates this important. Weakness: CWE-79. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.
Mitigation checklist
Recommended fix / mitigation
- Red Hat rates this important; a fix erratum may not be out yet — apply the RHSA as soon as it publishes.
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
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