XSS in Hepta Platforms Heptabase
CVE-2026-78213
Heptabase developed by Hepta Platforms, Inc. has a Stored Cross-Site Scripting vulnerability. Authenticated remote attackers can inject persistent malicious content into specific pages, causing arbitrary JavaScript code to execute when other users click the crafted content.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- www.twcert.org.tw/en/cp-139-11124-b8b51-2.html (third-party-advisory)
- www.twcert.org.tw/tw/cp-132-11125-9d359-1.html (third-party-advisory)
Frequently asked questions
- What is CVE-2026-78213?
- CVE-2026-78213 is a high-severity vulnerability in Hepta Platforms Heptabase, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-08-24.
- How severe is CVE-2026-78213?
- High severity. CVSS v3 base score is 8.7 out of 10.