simple-markdown simple-markdown.js 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 simple-markdown 0.5.1 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file simple-markdown.js. The manipulation leads to inefficient regular expression complexity. The attack can be launched remotely. Upgrading to version 0.5.2 is able to address this issue. The patch is named 89797fef9abb4cab2fb76a335968266a92588816. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-220639.
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 |
|---|---|---|---|---|---|
| — | simple-markdown | 0.5.1 | — | No fix listed | CNA |
| — | simple-markdown (npm) | before 0.5.2 | 0.5.2 | Patch available | GHSA-gpvj-gp8c-c7p2 |
- simple-markdown Vendor— Affected 0.5.1 Fixed in — No fix listed CNA
- simple-markdown (npm) Vendor— Affected before 0.5.2 Fixed in 0.5.2 Patch available GHSA-gpvj-gp8c-c7p2
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:khanacademy:simple-markdown:0.5.1:*:*:*:*:node.js:*:* | 0.5.1 | Vulnerable | Khanacademy |
- cpe:2.3:a:khanacademy:simple-markdown:0.5.1:*:*:*:*:node.js:*:* Versions 0.5.1 Vulnerable ·Khanacademy
Remediation
- Fix · GHSA-gpvj-gp8c-c7p2 simple-markdown (npm) Fixed in 0.5.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2019-25103
- 2026-10-03 Alias added: GHSA-gpvj-gp8c-c7p2
References
Patch 2
More Khanacademy Simple-markdown vulnerabilities
- TI-2019-15235 simple-markdown simple-markdown.js redos CVSS 3.1HIGH 7.5
- TI-2019-07226 simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI. CVSS 3.0MEDIUM 6.1
Sources
- CVE-2019-25103 · CVE Program
- CVE-2019-25103 · NVD
- FIRST EPSS
- GHSA-gpvj-gp8c-c7p2 · 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