Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-z1sg-2u88-pyaq
Vulnerability ID VCID-z1sg-2u88-pyaq
Aliases CVE-2023-27891
GHSA-r76w-3wwq-jv6v
PYSEC-2023-42
Summary rami.io pretix before 4.17.1 allows OAuth application authorization from a logged-out session. The fixed versions are 4.15.1, 4.16.1, and 4.17.1.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-613 Insufficient Session Expiration
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2023-27891
cvssv3.1 7.5 https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2023-42.yaml
cvssv4 8.7 https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2023-42.yaml
generic_textual HIGH https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2023-42.yaml
cvssv3.1 7.5 https://github.com/thufschmitt/pretix-nix
cvssv4 8.7 https://github.com/thufschmitt/pretix-nix
generic_textual HIGH https://github.com/thufschmitt/pretix-nix
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2023-27891
cvssv4 8.7 https://nvd.nist.gov/vuln/detail/CVE-2023-27891
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2023-27891
cvssv3.1 7.5 https://pretix.eu/about/en/blog/20230306-release-4171
cvssv4 8.7 https://pretix.eu/about/en/blog/20230306-release-4171
generic_textual HIGH https://pretix.eu/about/en/blog/20230306-release-4171
ssvc Track https://pretix.eu/about/en/blog/20230306-release-4171/
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2023-27891
https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2023-42.yaml
https://github.com/thufschmitt/pretix-nix
https://pretix.eu/about/en/blog/20230306-release-4171
https://pretix.eu/about/en/blog/20230306-release-4171/
CVE-2023-27891 https://nvd.nist.gov/vuln/detail/CVE-2023-27891
GHSA-r76w-3wwq-jv6v https://github.com/advisories/GHSA-r76w-3wwq-jv6v
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2023-42.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/pypa/advisory-database/tree/main/vulns/pretix/PYSEC-2023-42.yaml
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/thufschmitt/pretix-nix
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/thufschmitt/pretix-nix
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-27891
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-27891
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://pretix.eu/about/en/blog/20230306-release-4171
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://pretix.eu/about/en/blog/20230306-release-4171
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-06T15:15:33Z/ Found at https://pretix.eu/about/en/blog/20230306-release-4171/
Exploit Prediction Scoring System (EPSS)
Percentile 0.57091
EPSS Score 0.00342
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T20:31:30.010367+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/pretix/PYSEC-2023-42.yaml 38.6.0