The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade Echo:latest modsecurity-apache to version 2.7.7-1 or higher.
Note: Versions mentioned in the description apply only to the upstream modsecurity-apache package and not the modsecurity-apache package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
apache2/modsecurity.c in ModSecurity before 2.7.6 allows remote attackers to bypass rules by using chunked transfer coding with a capitalized Chunked value in the Transfer-Encoding HTTP header.