CVE-2020-11499Network attack vector

Stored XSS via unsanitized analysis fields

Published Apr 2, 2020 · Updated Aug 4, 2024

Stored XSS in Firmware Analysis and Comparison Tool 3 allows attackers to execute script in a user's browser via a crafted localhost web request. The upload-analysis/[uid] handler calls _get_meta_from_request() in helperFunctions/mongo_task_conversion.py and stores unescaped tags and version values that execute when rendered. Exploitation requires a victim to load a page containing the stored values; reported impact is browser-side script execution with confidentiality and integrity effects and no availability effect.

CVSS severity6.1
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Firmware Analysis and Comparison Tool 3 allows attackers to execute script in a user's browser via a crafted localhost web request. The upload-analysis/[uid] handler calls _get_meta_from_request() in helperFunctions/mongo_task_conversion.py and stores unescaped tags and version values that execute when rendered. Exploitation requires a victim to load a page containing the stored values; reported impact is browser-side script execution with confidentiality and integrity effects and no availability effect.

The record

CVE
CVE-2020-11499
Published
Apr 2, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.3MITRE CNACVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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