MEDIUM
squid: Cross-Site Scripting when generating HTTPS response messages about TLS errors
Published Nov 9, 2018
6.1
MEDIUMCVSS 3.0
EPSS 3.33%
Description
Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors.
Affected products
No data.
- < 4.4
No data.
Red Hat Enterprise Linux 5
squid
Not affected
Red Hat Enterprise Linux 6
squid
Will not fix
Red Hat Enterprise Linux 6
squid34
Will not fix
Red Hat Enterprise Linux 7
squid
Will not fix
Red Hat Enterprise Linux 8
squid
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | squid | Not affected | n/a |
| Red Hat Enterprise Linux 6 | squid | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | squid34 | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | squid | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | squid | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Remove %D error page macro from ERR_SECURE_CONNECT_FAIL pages found under /usr/share/squid/errors/ and any custom error pages.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
6.1 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Impact Low
Integrity Impact Low
Availability Impact None
1 other source (Red Hat) ▾
5.6 MEDIUM Red Hat
CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N
Attack Vector Adjacent
Attack Complexity High
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Impact None
Integrity Impact High
Availability Impact None
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.33% 0.03333
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03333
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (59 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.33% (0.03333) | 88.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.33% (0.03333) | 87.01th | v5 (v2026.06.15) |
| Mar 4, 2026 | 10.78% (0.10782) | 93.21th | v4 (v2025.03.14) |
| Mar 1, 2026 | 23.03% (0.23032) | 95.83th | v4 (v2025.03.14) |
| Feb 4, 2026 | 10.78% (0.10782) | 93.16th | v4 (v2025.03.14) |
| Feb 1, 2026 | 23.03% (0.23032) | 95.79th | v4 (v2025.03.14) |
| Jan 30, 2026 | 10.78% (0.10782) | 93.15th | v4 (v2025.03.14) |
| Jan 4, 2026 | 6.83% (0.06829) | 91.05th | v4 (v2025.03.14) |
| Jan 1, 2026 | 14.81% (0.14809) | 94.34th | v4 (v2025.03.14) |
| Dec 28, 2025 | 6.83% (0.06829) | 91.02th | v4 (v2025.03.14) |
| Dec 27, 2025 | 3.90% (0.03903) | 87.96th | v4 (v2025.03.14) |
| Dec 4, 2025 | 6.83% (0.06829) | 90.97th | v4 (v2025.03.14) |
| Dec 1, 2025 | 14.81% (0.14809) | 94.28th | v4 (v2025.03.14) |
| Nov 21, 2025 | 6.83% (0.06829) | 90.94th | v4 (v2025.03.14) |
| Nov 18, 2025 | 3.52% (0.03524) | 86.45th | v4 (v2025.03.14) |
| Nov 4, 2025 | 6.83% (0.06829) | 90.92th | v4 (v2025.03.14) |
| Nov 1, 2025 | 14.81% (0.14809) | 94.26th | v4 (v2025.03.14) |
| Oct 28, 2025 | 6.83% (0.06829) | 90.91th | v4 (v2025.03.14) |
| Oct 27, 2025 | 3.90% (0.03903) | 87.80th | v4 (v2025.03.14) |
| Oct 4, 2025 | 6.83% (0.06829) | 90.96th | v4 (v2025.03.14) |
| Oct 1, 2025 | 14.81% (0.14809) | 94.31th | v4 (v2025.03.14) |
| Sep 4, 2025 | 3.90% (0.03903) | 87.83th | v4 (v2025.03.14) |
| Sep 1, 2025 | 6.74% (0.06737) | 90.97th | v4 (v2025.03.14) |
| Aug 20, 2025 | 4.00% (0.04003) | 87.98th | v4 (v2025.03.14) |
| Aug 4, 2025 | 7.92% (0.07920) | 91.66th | v4 (v2025.03.14) |
| Aug 1, 2025 | 14.33% (0.14333) | 94.16th | v4 (v2025.03.14) |
| Jul 30, 2025 | 7.92% (0.07920) | 91.66th | v4 (v2025.03.14) |
| Jul 4, 2025 | 15.21% (0.15214) | 94.29th | v4 (v2025.03.14) |
| Jul 1, 2025 | 31.26% (0.31262) | 96.56th | v4 (v2025.03.14) |
| Jun 16, 2025 | 15.42% (0.15419) | 94.29th | v4 (v2025.03.14) |
| Jun 4, 2025 | 20.01% (0.20012) | 95.16th | v4 (v2025.03.14) |
| Jun 1, 2025 | 35.42% (0.35417) | 96.86th | v4 (v2025.03.14) |
| May 4, 2025 | 20.01% (0.20012) | 95.11th | v4 (v2025.03.14) |
| May 1, 2025 | 35.42% (0.35417) | 96.83th | v4 (v2025.03.14) |
| Apr 12, 2025 | 20.01% (0.20012) | 95.01th | v4 (v2025.03.14) |
| Apr 11, 2025 | 35.42% (0.35417) | 96.74th | v4 (v2025.03.14) |
| Apr 10, 2025 | 20.01% (0.20012) | 95.01th | v4 (v2025.03.14) |
| Apr 9, 2025 | 35.42% (0.35417) | 96.74th | v4 (v2025.03.14) |
| Mar 30, 2025 | 20.01% (0.20012) | 95.00th | v4 (v2025.03.14) |
| Mar 29, 2025 | 61.70% (0.61705) | 97.62th | v4 (v2025.03.14) |
| Mar 28, 2025 | 20.01% (0.20012) | 95.01th | v4 (v2025.03.14) |
| Mar 27, 2025 | 37.73% (0.37730) | 96.68th | v4 (v2025.03.14) |
| Mar 26, 2025 | 35.42% (0.35417) | 96.68th | v4 (v2025.03.14) |
| Mar 22, 2025 | 20.01% (0.20012) | 95.04th | v4 (v2025.03.14) |
| Mar 21, 2025 | 35.42% (0.35417) | 96.75th | v4 (v2025.03.14) |
| Mar 20, 2025 | 20.01% (0.20012) | 95.04th | v4 (v2025.03.14) |
| Mar 19, 2025 | 37.73% (0.37730) | 96.74th | v4 (v2025.03.14) |
| Mar 18, 2025 | 20.01% (0.20012) | 95.04th | v4 (v2025.03.14) |
| Mar 17, 2025 | 35.42% (0.35417) | 96.69th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.15% (0.00151) | 52.71th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.10% (0.00098) | 41.02th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.10% (0.00096) | 38.99th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.09% (0.00087) | 35.02th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.15% (0.00148) | 50.10th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.18% (0.00182) | 53.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.28% (0.03283) | 84.30th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.28% (0.03283) | 65.67th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v5 (v2026.06.15) |
| Apr 14, 2021 | 3.63% (0.03630) | 0.00th | v1 |
Weaknesses (1)
References (7)
- http://www.squid-cache.org/Advisories/SQUID-2018_4.txt x_refsource_MISCMitigationVendor Advisory
- http://www.squid-cache.org/Versions/v5/changesets/squid-5-6feeb15ff312f3e145763adf8d234ed6a0b3f11d.patch x_refsource_MISCPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2018-19131 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1645146 Issue Tracking
- https://github.com/squid-cache/squid/pull/306 x_refsource_MISCThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-19131
- https://www.cve.org/CVERecord?id=CVE-2018-19131
| Link | Providers | Tags |
|---|---|---|
| http://www.squid-cache.org/Advisories/SQUID-2018_4.txt | x_refsource_MISCMitigationVendor Advisory | |
| http://www.squid-cache.org/Versions/v5/changesets/squid-5-6feeb15ff312f3e145763adf8d234ed6a0b3f11d.patch | x_refsource_MISCPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2018-19131 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1645146 | Issue Tracking | |
| https://github.com/squid-cache/squid/pull/306 | x_refsource_MISCThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-19131 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-19131 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Nov 9, 2018
Updated Sep 16, 2024
Reserved Nov 9, 2018
Link CVE-2018-19131
CISA Vulnrichment
Updated n/a