How severe is CVE-2024-6844?

CVE-2024-6844 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2024-6844 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-6844?

CVE-2024-6844 affects Flask-cors Project Flask-cors. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-6844?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-6844 have an EU (EUVD) identifier?

Yes. CVE-2024-6844 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6972.

When was CVE-2024-6844 published?

CVE-2024-6844 was published on 2025-03-20 and last updated on 2026-06-17.

CVE-2024-6844

CVE-2024-6844 is a medium-severity vulnerability in Flask-cors Project Flask-cors with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-6972
Weakness: CWE-346
Affected product: Flask-cors Project Flask-cors
Published: 2025-03-20
Last modified: 2026-06-17

Description

A vulnerability in corydolphin/flask-cors version 4.0.1 allows for inconsistent CORS matching due to the handling of the '+' character in URL paths. The request.path is passed through the unquote_plus function, which converts the '+' character to a space ' '. This behavior leads to incorrect path normalization, causing potential mismatches in CORS configuration. As a result, endpoints may not be matched correctly to their CORS settings, leading to unexpected CORS policy application. This can cause unauthorized cross-origin access or block valid requests, creating security vulnerabilities and usability issues.

Frequently asked questions

What is CVE-2024-6844?: A vulnerability in corydolphin/flask-cors version 4.0.1 allows for inconsistent CORS matching due to the handling of the '+' character in URL paths. The request.path is passed through the unquote_plus function, which converts the '+' character to a space ' '. This behavior leads to incorrect path normalization, causing potential mismatches in CORS configuration. As a result, endpoints may not be matched correctly to their CORS settings, leading to unexpected CORS policy application. This can cause unauthorized cross-origin access or block valid requests, creating security vulnerabilities and usability issues.
How severe is CVE-2024-6844?: CVE-2024-6844 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2024-6844 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-6844?: CVE-2024-6844 affects Flask-cors Project Flask-cors. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-6844?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-6844 have an EU (EUVD) identifier?: Yes. CVE-2024-6844 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6972.
When was CVE-2024-6844 published?: CVE-2024-6844 was published on 2025-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:flask-cors_project:flask-cors:4.0.1:*:*:*:*:*:*:*

More vulnerabilities in Flask-cors Project Flask-cors

CVE-2024-6866 — High (CVSS 7.5): corydolphin/flask-cors version 4.01 contains a vulnerability where the request path matching is case-insensitive due to…
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CVE-2024-6839 — Medium (CVSS 5.3): corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes…

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