CVE-2018-20852

mediumpriority · track · 22EPSS 0.037 · 90 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.67% (90th) EPSS

CVSS 5 · medium

Is it mine?

77 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondaryexploitability 2.8 · impact 1.4

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20US

affected products (77)

Products and version ranges known to be affected.

Avaya Aura Application Enablement Servicesall versionscert_bundDEcpe:/a:avaya:aura_application_enablement_services:-
Avaya Aura Communication Managerall versionscert_bundDEcpe:/a:avaya:communication_manager:-
Avaya Aura Session Managerall versionscert_bundDEcpe:/a:avaya:session_manager:-
Avaya Aura System Managerall versionscert_bundDEcpe:/a:avaya:aura_system_manager:-
Avaya Web License Managerall versionscert_bundDEcpe:/a:avaya:web_license_manager:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Oracle VMall versionscert_bundDEcpe:/a:oracle:vm:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
n/a n/a≤ n/aenisa_euvdEU
Canonical Ltd. Ubuntu≤ 19.04fstec_bduRU
Canonical Ltd. Ubuntu≤ 18.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 14.04 ESMfstec_bduRU
Canonical Ltd. Ubuntu≤ 16.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 12.04fstec_bduRU
Fedora Project Fedora≤ 30fstec_bduRU
Fedora Project Fedora≤ 31fstec_bduRU
Fedora Project Fedora≤ 29fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.1fstec_bduRU

showing 20 of 77

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-1597Python: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2019-07-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Python ausnutzen, um Informationen offenzulegen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2019-07-13modified 2026-10-07

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references (84)

External citations — patches, advisories, analysis.

scry

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