Cross-site Scripting (XSS) Affecting squid package, versions <4.4-1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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- published24 Jul 2026
- disclosed9 Nov 2018
Introduced: 9 Nov 2018
CVE-2018-19131 (opens in a new tab)How to fix?
Upgrade Echo:latest squid to version 4.4-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream squid package and not the squid package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors.
References
- https://advisory.echohq.com/cve/CVE-2018-19131
- http://www.squid-cache.org/Advisories/SQUID-2018_4.txt
- http://www.squid-cache.org/Versions/v5/changesets/squid-5-6feeb15ff312f3e145763adf8d234ed6a0b3f11d.patch
- https://github.com/squid-cache/squid/pull/306
- https://github.com/JonathanWilbur/CVE-2018-19131