CVE-2017-20239

MDwiki contains a cross-site scripting vulnerability that allows remote attackers to execute arbitrary JavaScript by injecting malicious code through the location hash parameter. Attackers can craft URLs with JavaScript payloads in the hash fragment that are parsed and rendered without sanitization, causing the injected scripts to execute in the victim's browser context.

CVSS v4.0

5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.27% chance of exploitation in the next 30 days, 18th percentile

Published

2026-04-12

Updated

2026-05-24

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/46097

References

• CVE Record
• NVD entry

Related

• CVE-2017-20229
• CVE-2017-20243
• CVE-2017-20228
• CVE-2017-20244
• CVE-2017-20227
• CVE-2017-20245