Sisimai string.rb to_plain redos
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-1333.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Sisimai | 4.25.14p11 | — | No fix listed | CNA |
| — | sisimai (RubyGems) | before 4.25.14p12 | 4.25.14p12 | Patch available | GHSA-vm74-j4wq-82xj |
- Sisimai Vendor— Affected 4.25.14p11 Fixed in — No fix listed CNA
- sisimai (RubyGems) Vendor— Affected before 4.25.14p12 Fixed in 4.25.14p12 Patch available GHSA-vm74-j4wq-82xj
CPE configurations NVD · 11
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libsisimai:sisimai:*:*:*:*:*:*:*:* | before 4.25.14 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:-:*:*:*:*:*:* | 4.25.14 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p1:*:*:*:*:*:* | 4.25.14 p1 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p10:*:*:*:*:*:* | 4.25.14 p10 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p11:*:*:*:*:*:* | 4.25.14 p11 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p3:*:*:*:*:*:* | 4.25.14 p3 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p5:*:*:*:*:*:* | 4.25.14 p5 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p6:*:*:*:*:*:* | 4.25.14 p6 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p7:*:*:*:*:*:* | 4.25.14 p7 | Vulnerable | Libsisimai |
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p8:*:*:*:*:*:* | 4.25.14 p8 | Vulnerable | Libsisimai |
- cpe:2.3:a:libsisimai:sisimai:*:*:*:*:*:*:*:* Versions before 4.25.14 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:-:*:*:*:*:*:* Versions 4.25.14 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p1:*:*:*:*:*:* Versions 4.25.14 p1 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p10:*:*:*:*:*:* Versions 4.25.14 p10 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p11:*:*:*:*:*:* Versions 4.25.14 p11 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p3:*:*:*:*:*:* Versions 4.25.14 p3 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p5:*:*:*:*:*:* Versions 4.25.14 p5 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p6:*:*:*:*:*:* Versions 4.25.14 p6 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p7:*:*:*:*:*:* Versions 4.25.14 p7 Vulnerable ·Libsisimai
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p8:*:*:*:*:*:* Versions 4.25.14 p8 Vulnerable ·Libsisimai
Show 1 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libsisimai:sisimai:4.25.14:p9:*:*:*:*:*:* | 4.25.14 p9 | Vulnerable | Libsisimai |
- cpe:2.3:a:libsisimai:sisimai:4.25.14:p9:*:*:*:*:*:* Versions 4.25.14 p9 Vulnerable ·Libsisimai
Remediation
- Fix · GHSA-vm74-j4wq-82xj sisimai (RubyGems) Fixed in 4.25.14p12 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2022-4891
- 2026-10-03 Alias added: GHSA-vm74-j4wq-82xj
References
Exploit 2
Patch 2
Sources
- CVE-2022-4891 · CVE Program
- CVE-2022-4891 · NVD
- FIRST EPSS
- GHSA-vm74-j4wq-82xj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences