CVE-2023-27043
At a glance
- Severity
- MEDIUM 5.3
- EPSS
- EPSS 2.53 % · percentile 85 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mitre
- NVD status
- Modified
Description
The email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2822 header is identified as the value of the addr-spec. In some applications, an attacker can bypass a protection mechanism in which application access is granted only after verifying receipt of e-mail to a specific domain (e.g., only @company.example.com addresses may be used for signup). This occurs in email/_parseaddr.py in recent versions of Python.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2023-30832
- GCVE · GCVE-0-2023-27043
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0395 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1057 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1054 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1036 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0969 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0967 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0864 — Multiples vulnérabilités dans VMware Tanzu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0756 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0661 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0622 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0258 — Multiples vulnérabilités dans les produits Apple · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0214 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0958 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0506 — Multiples vulnérabilités dans Juniper Secure Analytics · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0385 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0305 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0297 — Multiples vulnérabilités dans Juniper · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0262 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*cpe:2.3:a:python:python:*:*:*:*:*:*:*:*≤ 2.7.18cpe:2.3:a:python:python:*:*:*:*:*:*:*:*≥ 3.0 < 3.8.20cpe:2.3:a:python:python:*:*:*:*:*:*:*:*≥ 3.9.0 < 3.9.20cpe:2.3:a:python:python:*:*:*:*:*:*:*:*≥ 3.10.0 < 3.10.15cpe:2.3:a:python:python:*:*:*:*:*:*:*:*≥ 3.11.0 < 3.11.10cpe:2.3:a:python:python:*:*:*:*:*:*:*:*≥ 3.12.0 < 3.12.6
Affected products
| Product | Versions |
|---|---|
| affected n/a |
References
- https://github.com/python/cpython/issues/102988
- http://python.org
- https://python-security.readthedocs.io/vuln/email-parseaddr-realname.html
- https://security.netapp.com/advisory/ntap-20230601-0003/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORLXS5YTKN65E2Q2NWKXMFS5FWQHRNZW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PHVGRKQAGANCSGFI3QMYOCIMS4IFOZA5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PU6Y2S5CBN5BWCBDAJFTGIBZLK3S2G3J/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWMBD4LNHWEXRI6YVFWJMTJQUL5WOFTS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZAEFSFZDNBNJPNOUTLG5COISGQDLMGV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SINP4OVYNB2AGDYI2GS37EMW3H3F7XPZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZXC32CJ7TWDPJO6GY2XIQRO7JZX5FLP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RDDC2VOX7OQC6OHMYTVD4HLFZIV6PYBC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NEUNZSZ3CVSM2QWVYH3N2XGOCDWNYUA3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YQVY5C5REXWJIORJIL2FIL3ALOEJEF72/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/75DTHSTNOFFNAWHXKMDXS7EJWC6W2FUC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2W2BZQIHMCKRI5FNBJERFYMS5PK6TAH/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ARI7VDSNTQVXRQFM6IK5GSSLEIYV4VZH/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SOX7BCN6YL7B3RFPEEXPIU5CMTEHJOKR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N6M5I6OQHJABNEYY555HUMMKX3Y4P25Z/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2MAICLFDDO3QVNHTZ2OCERZQ34R2PIC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HXYVPEZUA3465AEFX5JVFVP7KIFZMF3N/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QDRDDPDN3VFIYXJIYEABY6USX5EU66AG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BQAKLUJMHFGVBRDPEY57BJGNCE5UUPHW/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4ZAEFSFZDNBNJPNOUTLG5COISGQDLMGV/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/75DTHSTNOFFNAWHXKMDXS7EJWC6W2FUC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PHVGRKQAGANCSGFI3QMYOCIMS4IFOZA5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PU6Y2S5CBN5BWCBDAJFTGIBZLK3S2G3J/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QDRDDPDN3VFIYXJIYEABY6USX5EU66AG/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RDDC2VOX7OQC6OHMYTVD4HLFZIV6PYBC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SINP4OVYNB2AGDYI2GS37EMW3H3F7XPZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VZXC32CJ7TWDPJO6GY2XIQRO7JZX5FLP/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWMBD4LNHWEXRI6YVFWJMTJQUL5WOFTS/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YQVY5C5REXWJIORJIL2FIL3ALOEJEF72/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ARI7VDSNTQVXRQFM6IK5GSSLEIYV4VZH/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BQAKLUJMHFGVBRDPEY57BJGNCE5UUPHW/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HXYVPEZUA3465AEFX5JVFVP7KIFZMF3N/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6M5I6OQHJABNEYY555HUMMKX3Y4P25Z/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NEUNZSZ3CVSM2QWVYH3N2XGOCDWNYUA3/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ORLXS5YTKN65E2Q2NWKXMFS5FWQHRNZW/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P2MAICLFDDO3QVNHTZ2OCERZQ34R2PIC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P2W2BZQIHMCKRI5FNBJERFYMS5PK6TAH/
- http://seclists.org/fulldisclosure/2025/Apr/8
- https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html
- https://lists.debian.org/debian-lts-announce/2024/11/msg00024.html
- https://cert-portal.siemens.com/productcert/html/ssa-202008.html
- https://cert-portal.siemens.com/productcert/html/ssa-577017.html
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |