CVE-2020-36827Network attack vector

Authenticated cross-site scripting via unescaped JSON embedding

Published Mar 24, 2024 · Updated Mar 28, 2025

Cross-site scripting in XAO::Web before 1.84 allows remote authenticated users to inject script into pages through crafted JSON data. Web::Action display_data sends to_json output directly to textout without escaping angle brackets, so a value closes the enclosing script block and starts attacker-supplied markup. Exploitation requires control of data rendered with json-embed; the injected script runs in the page context and can read or modify data available there.

CVSS severity5.4
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in XAO::Web before 1.84 allows remote authenticated users to inject script into pages through crafted JSON data. Web::Action display_data sends to_json output directly to textout without escaping angle brackets, so a value closes the enclosing script block and starts attacker-supplied markup. Exploitation requires control of data rendered with json-embed; the injected script runs in the page context and can read or modify data available there.

The record

CVE
CVE-2020-36827
Published
Mar 24, 2024
Updated
Mar 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-791, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-791Incomplete Filtering of Special Elements
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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