CVE-2019-25102simple-markdown simple-markdown.js redos
- 4.3MediumCVSS base score
- 1.1%Exploitation in 30 daysEPSS · top 34% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
A vulnerability, which was classified as problematic, was found in simple-markdown 0.6.0. Affected is an unknown function of the file simple-markdown.js. The manipulation with the input <<<<<<<<<<:/:/:/:/:/:/:/:/:/:/ leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.6.1 is able to address this issue. The patch is identified as 015a719bf5cdc561feea05500ecb3274ef609cd2. It is recommended to upgrade the affected component. VDB-220638 is the identifier assigned to this vulnerability.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit.
Show the exploits1
References tagged exploit1 reference
- https://github.com/ariabuckles/simple-markdown/pull/73 (opens in a new tab)exploitissue-trackingx_transferred
Timeline
ID reserved
By VulDB
- 1 day later
· 1 day later
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulDBCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| VulDBCNA (assigner) | 3.0 | Medium4.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| VulDBCNA (assigner) | 2.0 | Medium4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.1% · top 34% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
simple-markdown
- affected 0.6.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmsimple-markdownGHSA-j533-2g8v-pmpg (opens in a new tab)
References
References5
- https://vuldb.com/?id.220638 (opens in a new tab)vdb-entrytechnical-descriptionx_transferred
- https://vuldb.com/?ctiid.220638 (opens in a new tab)signaturepermissions-requiredx_transferred
- https://github.com/ariabuckles/simple-markdown/pull/73 (opens in a new tab)exploitissue-trackingx_transferred
- https://github.com/ariabuckles/simple-markdown/commit/015a719bf5cdc561feea05500ecb3274ef609cd2 (opens in a new tab)patchx_transferred
- https://github.com/ariabuckles/simple-markdown/releases/tag/0.6.1 (opens in a new tab)patchx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-0728 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-j533-2g8v-pmpg (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-25102)Record last updated .