CVE-2023-49438 json
Open redirect vulnerability in Flask-Security-Too
published 2023-12-26 2 y ago modified 2026-06-17 4 mo ago also GHSA-672h-6x89-76m5 , PYSEC-2023-248 , EUVD-2023-0079
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
An open redirect vulnerability in the python package Flask-Security-Too <=5.3.2 allows attackers to redirect unsuspecting users to malicious sites via a crafted URL by abusing the ?next parameter on the /login and /register routes.
Patch / fix
- pypi flask-security-too 5.3.3
- python-Flask-Security openSUSE Tumbleweed 5.5.2-1.1
opensuse advisories openSUSE-SU-2024:14555-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2023-49438 updated cvss 6.5
flask-security: open-redirect by abusing the ?next parameter on the /login and /register routes
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Python Flask-Security-Too <=5.3.2 - Open Redirect nuclei detection template
- github.com https://github.com/brandon-t-elliott/CVE-2023-49438 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | flask-security-too | <5.3.3 |
5.3.3 |
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
github.com
/Flask-Middleware/flask-security/commit/8b5abc4d4db9926a3d76b34b8b03255effb5e712
web
-
github.com
/brandon-t-elliott/CVE-2023-49438
web, exploit, mitigation, third-party-advisory, evidence
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/6HCYH377TPUMUHELPI36PDS2ZM4VFIXM/
vendor-advisory, web
-
github.com
/Flask-Middleware/flask-security
package, product, web
- lists.fedoraproject.org /archives/list/package-announce@lists.fedoraproject.org/message/6HCYH377TPUMUHELPI36PDS2ZM4VFIXM/
-
nvd.nist.gov
/vuln/detail/CVE-2023-49438
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/flask-security-too/PYSEC-2023-248.yaml
web
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/6HCYH377TPUMUHELPI36PDS2ZM4VFIXM
web
-
github.com
/advisories/GHSA-672h-6x89-76m5
advisory
Sources
- CVE List CVE-2023-49438
- GitHub Advisory GHSA-672h-6x89-76m5
- NVD CVE-2023-49438
- OSV PYSEC-2023-248
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.