XSS in Cebe Markdown
CVE-2018-1000874
PHP cebe markdown parser version 1.2.0 and earlier contains a Cross Site Scripting (XSS) vulnerability in all distributed parsers allowing a malicious crafted script to be executed that can result in the lose of user data and sensitive user information. This attack can be exploited by crafting a three backtick wrapped payload with a character in front: L: "```<script>alert();</script>```". NOTE: This has been argued as a non-issue (see references) since it is not the parser's job to sanitize malicious code from a parsed document
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.008 (52.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Cebe Markdown
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (x_refsource_MISC)
Frequently asked questions
- What is CVE-2018-1000874?
- CVE-2018-1000874 is a medium-severity vulnerability in Cebe Markdown, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-12-20.
- How severe is CVE-2018-1000874?
- Medium severity. CVSS v3 base score is 6.1 out of 10.