VulnerabilityModified
CVE-2018-11503
The isfootnote function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.
MEDIUM 5.5EPSS 1.57%
Does this matter?
Lower severity and a low EPSS score (1.57%). Track it; it rarely justifies an emergency change on its own.
Description
The isfootnote function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 1.57% probability · 75th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- discount project/discount · debian/debian linux
- Source
- cve@mitre.org
EPSS moved from 2.8% on 21 September 2026 to 1.6% on 27 October 2026.
References
- https://github.com/Orc/discount/issues/189#issuecomment-392247798Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00009.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2018/dsa-4293Third Party Advisory
- https://github.com/Orc/discount/issues/189#issuecomment-392247798Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00009.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2018/dsa-4293Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.