Medium severity · published Nov 9, 2018
CVE-2018-19131
Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors
6.1
CVSS
3.3%
EPSS
No
On KEV
Description
Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)3.3% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SQ
Squid · Squid-cache
before 4.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-19131
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-19131
Mitigation
http://www.squid-cache.org/Advisories/SQUID-2018_4.txt
Patch
http://www.squid-cache.org/Versions/v5/changesets/squid-5-6feeb15ff312f3e145763adf8d234ed6a0b3f11d.patch
Third Party Advisory
https://github.com/squid-cache/squid/pull/306
More from Squid
9.8
CVE-2025-54574
Squid is a caching proxy for the Web
9.8
CVE-2020-11945
An issue was discovered in Squid before 5.0.2
9.8
CVE-2019-12519
An issue was discovered in Squid through 4.7
9.8
CVE-2019-12524
An issue was discovered in Squid through 4.7
9.8
CVE-2019-12526
An issue was discovered in Squid before 4.9