CTFd __init__.py _is_safe_url redirect
30Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.3
exploitation probability
—
observed exploitation
nono source reports it
1 public exploit(s)
A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Affected products
n/a · CTFdpublic PoCs found — 1
cve_referencemblunt.dev/writeups/ctfd-open-redirect/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://github.com/CTFd/CTFd/https://github.com/CTFd/CTFd/commit/5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9https://github.com/CTFd/CTFd/pull/3026https://github.com/CTFd/CTFd/releases/tag/3.8.4https://mblunt.dev/writeups/ctfd-open-redirect/https://vuldb.com/cve/CVE-2026-78145https://vuldb.com/submit/882469https://vuldb.com/vuln/394533https://vuldb.com/vuln/394533/cti