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CVE-2021-36191

MEDIUMCVSS 5.4/10EPSS 0.51%

Last modified

CVE-2021-36191 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A url redirection to untrusted site ('open redirect') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows attacker to use the device as proxy via crafted GET parameters in requests to error handlers. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

A url redirection to untrusted site ('open redirect') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows attacker to use the device as proxy via crafted GET parameters in requests to error handlers

Metrics

CVSS 3.1
5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability
0.51%

39.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
FortinetFortiweb>= 6.0.0, <= 6.0.7
FortinetFortiweb>= 6.2.0, <= 6.2.6
FortinetFortiweb>= 6.3.0, <= 6.3.15
FortinetFortiweb6.1.0
FortinetFortiweb6.1.1
FortinetFortiweb6.1.2
FortinetFortiweb6.4.0
FortinetFortiweb6.4.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-36191?
A url redirection to untrusted site ('open redirect') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows attacker to use the device as proxy via crafted GET parameters in requests to error handlers
How severe is CVE-2021-36191?
CVE-2021-36191 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.
How do I fix CVE-2021-36191?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36191?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST