Security readout for executives and security teams
Plain-English summary
This issue can let an unauthenticated remote user make vulnerable Django applications spend excessive CPU validating crafted email or URL input. The business impact is service disruption, not data theft or code execution, based on the provided CVSS and description.
Executive priority
Treat this as a high-priority availability fix for public Django services. It is not described as data compromise or remote code execution, but unauthenticated denial of service can still affect revenue, customer access, and operational confidence.
Technical view
Django EmailValidator and URLValidator in 3.2 before 3.2.20, 4.0/4.1 before 4.1.10, and 4.2 before 4.2.3 are vulnerable to ReDoS involving excessive domain name labels. CVSS 3.1 is 7.5: network reachable, low complexity, no privileges, availability impact only.
Likely exposure
Exposure is most likely in Django applications on affected versions that validate untrusted email or URL fields through Django’s built-in validators, especially public forms and APIs. The source bundle does not identify specific downstream products beyond Django and distro package advisories.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is remotely reachable without authentication when affected validation paths process attacker-controlled inputs, but the documented impact is denial of service through regex performance degradation.
Researcher notes
This is CWE-1333 ReDoS in Django validators. Validate by version and code-path exposure rather than exploit testing. Evidence is strong for affected and fixed Django versions, but the bundle does not provide active exploitation data or product-specific exposure beyond Django packages.
Mitigation direction
- Upgrade Django to 3.2.20, 4.1.10, 4.2.3, or later supported releases.
- Apply Debian or Fedora python-django security updates where Django is installed from distribution packages.
- Prioritize internet-facing forms and APIs that accept email or URL values.
- Check Django and operating-system vendor advisories for any environment-specific guidance.
Validation and detection
- Inventory Django versions in dependency manifests, lockfiles, containers, and running environments.
- Confirm production uses fixed Django versions or patched distribution packages.
- Map public routes that validate user-supplied email or URL fields.
- Review availability metrics for abnormal latency or errors on validation-heavy endpoints.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-1333: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-36053 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://groups.google.com/forum/#%21forum/django-announceCVE reference
- https://docs.djangoproject.com/en/4.2/releases/security/CVE reference
- https://www.djangoproject.com/weblog/2023/jul/03/security-releases/CVE reference
- [debian-lts-announce] 20230719 [SECURITY] [DLA 3500-1] python-django security updateCVE reference · mailing-list
- DSA-5465CVE reference · vendor-advisory
- FEDORA-2023-cc023fabb7CVE reference · vendor-advisory
- FEDORA-2023-9d36d373f1CVE reference · vendor-advisory
- FEDORA-2024-84fbbbb914CVE reference · vendor-advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Inefficient Regular Expression Complexity
Inefficient Regular Expression Complexity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.