A vulnerability has been found in CTFd up to 3.8.4. (CVE-2026-78145)
CTFd versions up to 3.8.4 contain an open redirect vulnerability in the _is_safe_url function within CTFd/utils/validators/__init__.py. This vulnerability allows remote attackers to manipulate the 'Next' argument to redirect users to arbitrary URLs. The vulnerability has a low severity rating and a CVSS score of 4.3. A patch identified by commit 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9 is available, and upgrading is recommended.
AI Analysis
Technical Summary
An open redirect vulnerability (CWE-601) exists in CTFd up to version 3.8.4 in the _is_safe_url function of the file CTFd/utils/validators/__init__.py. The vulnerability arises from improper validation of the 'Next' argument, enabling attackers to redirect users to arbitrary external URLs. This can be exploited remotely and the exploit has been publicly disclosed. The vulnerability has a CVSS 3.1 base score of 4.3 (low severity) with vector AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N. A patch is available identified by commit 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9, and upgrading the affected component is recommended.
Potential Impact
The vulnerability allows remote attackers to perform open redirect attacks by manipulating the 'Next' argument. This can lead to user redirection to malicious sites, potentially facilitating phishing or social engineering attacks. There is no direct impact on confidentiality or availability. The exploit requires user interaction (UI:R) and does not require privileges (PR:N).
Mitigation Recommendations
A patch is available as identified by commit 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Users should upgrade CTFd to a version including this patch to remediate the vulnerability. No additional mitigations are specified.
A vulnerability has been found in CTFd up to 3.8.4. (CVE-2026-78145)
Description
CTFd versions up to 3.8.4 contain an open redirect vulnerability in the _is_safe_url function within CTFd/utils/validators/__init__.py. This vulnerability allows remote attackers to manipulate the 'Next' argument to redirect users to arbitrary URLs. The vulnerability has a low severity rating and a CVSS score of 4.3. A patch identified by commit 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9 is available, and upgrading is recommended.
CVSS v3.1
Score 4.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An open redirect vulnerability (CWE-601) exists in CTFd up to version 3.8.4 in the _is_safe_url function of the file CTFd/utils/validators/__init__.py. The vulnerability arises from improper validation of the 'Next' argument, enabling attackers to redirect users to arbitrary external URLs. This can be exploited remotely and the exploit has been publicly disclosed. The vulnerability has a CVSS 3.1 base score of 4.3 (low severity) with vector AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N. A patch is available identified by commit 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9, and upgrading the affected component is recommended.
Potential Impact
The vulnerability allows remote attackers to perform open redirect attacks by manipulating the 'Next' argument. This can lead to user redirection to malicious sites, potentially facilitating phishing or social engineering attacks. There is no direct impact on confidentiality or availability. The exploit requires user interaction (UI:R) and does not require privileges (PR:N).
Mitigation Recommendations
A patch is available as identified by commit 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Users should upgrade CTFd to a version including this patch to remediate the vulnerability. No additional mitigations are specified.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9x8r-fvqr-38vh
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-78145"]
- Ecosystems
- []
- Database Specific Severity
- LOW
- Cvss Version
- 3.1
Threat ID: 6a8c4c7dacd9273b499c104c
Added to database: 08/24/2026, 13:51:57 UTC
Last enriched: 08/24/2026, 14:32:21 UTC
Last updated: 08/24/2026, 15:51:58 UTC
Views: 7
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