CVE-2022-4891

Public Exploit
Sisimai string.rb to_plain redos

Description

A vulnerability has been found in Sisimai up to 4.25.14p11 and classified as problematic. This vulnerability affects the function to_plain of the file lib/sisimai/string.rb. The manipulation leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. Upgrading to version 4.25.14p12 is able to address this issue. The name of the patch is 51fe2e6521c9c02b421b383943dc9e4bbbe65d4e. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-218452.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.09%
Third-Party Advisory githubusercontent.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory vuldb.com Third-Party Advisory vuldb.com
Affected: n/a Sisimai
Published at:
Updated at:

References

Link Tags
https://vuldb.com/?id.218452 third party advisory vdb entry permissions required technical description
https://vuldb.com/?ctiid.218452 signature third party advisory permissions required
https://github.com/sisimai/rb-sisimai/pull/244 patch third party advisory issue tracking exploit
https://gist.githubusercontent.com/gmcabrita/e5dc0332473fc2e3a7a407434c8d21c7/raw/00b12035e5e1b685469f143b94301a50306376ba/example.html third party advisory exploit
https://github.com/sisimai/rb-sisimai/commit/51fe2e6521c9c02b421b383943dc9e4bbbe65d4e third party advisory patch
https://github.com/sisimai/rb-sisimai/releases/tag/v4.25.14p12 patch third party advisory release notes

Frequently Asked Questions

What is the severity of CVE-2022-4891?
CVE-2022-4891 has been scored as a low severity vulnerability.
How to fix CVE-2022-4891?
To fix CVE-2022-4891, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-4891 being actively exploited in the wild?
It is possible that CVE-2022-4891 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-4891?
CVE-2022-4891 affects n/a Sisimai.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.