- Description
- justhtml before 1.12.0 (versions <= 1.11.0) contains a mutation cross-site scripting (mXSS) vulnerability in the serialization of raw-text elements such as <style> and <script>. When a DOM tree is processed by sanitize_dom() using a custom policy that keeps these elements, text nodes inside them are serialized literally without escaping, allowing attacker-controlled text containing the matching closing tag sequence to break out of the raw-text context and inject arbitrary HTML into the serialized output. The default sanitization policy is not affected because it drops the contents of style and script.
- Source
- disclosure@vulncheck.com
- NVD status
- Received
CVSS 4.0
- Type
- Secondary
- Base score
- 5.1
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS: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
- Severity
- MEDIUM
CVSS 3.1
- Type
- Primary
- Base score
- 6.1
- Impact score
- 2.7
- Exploitability score
- 2.8
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Severity
- MEDIUM
- disclosure@vulncheck.com
- CWE-79
- Hype score
- Not currently trending
🚨*CVE* CVE-2026-8630 justhtml before 1.12.0 (versions <= 1.11.0) contains a mutation cross-site scripting (mXSS) vulnerability in the serialization of raw-text elements such as
@infoflowcloud
23 Aug 2026
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CVE-2026-8630 Mutation XSS in justhtml 1.11.0 and Earlier via Raw-Text Element Serialization https://t.co/ixqOs5qcf8
@VulmonFeeds
23 Aug 2026
53 Impressions
0 Retweets
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1 Bookmark
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