CVE-2021-40900 — HIGH (7.5)

Vulnerability Description

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in regexfn v1.0.5 when validating crafted invalid emails.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Regexfn Project	Regexfn	1.0.5

Related Weaknesses (CWE)

CWE-1333

References

https://github.com/yetingli/SaveResults/blob/main/js/regexfn.jsExploitThird Party Advisory
https://github.com/yetingli/SaveResults/blob/main/js/regexfn.jsExploitThird Party Advisory

FAQ

What is CVE-2021-40900?

CVE-2021-40900 is a vulnerability with a CVSS score of 7.5 (HIGH). A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in regexfn v1.0.5 when validating crafted invalid emails.

How severe is CVE-2021-40900?

CVE-2021-40900 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40900?

Check the references section above for vendor advisories and patch information. Affected products include: Regexfn Project Regexfn.