CVE-2024-46976Network attack vector

Stored XSS via crafted TechDocs storage content

Published Sep 17, 2024 · Updated Sep 18, 2024

Stored XSS in Backstage before 1.10.13 allows attackers to execute scripts in a victim's browser via crafted TechDocs storage content. The TechDocs backend returns static HTML fetched from configured storage, but published material does not disclose which validation or transformation step lets executable content bypass JavaScript removal. Exploitation requires control of TechDocs storage and a victim who browses the documentation or follows an attacker-provided link.

CVSS severity6.5
Medium
EPSS probability0.29%
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 Backstage before 1.10.13 allows attackers to execute scripts in a victim's browser via crafted TechDocs storage content. The TechDocs backend returns static HTML fetched from configured storage, but published material does not disclose which validation or transformation step lets executable content bypass JavaScript removal. Exploitation requires control of TechDocs storage and a victim who browses the documentation or follows an attacker-provided link.

The record

CVE
CVE-2024-46976
Published
Sep 17, 2024
Updated
Sep 18, 2024
Vendor
Backstage
Product
Backstage
Classifications
CWE-79, CWE-693, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.10.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Backstage · Backstageversion=< 1.10.13

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-693Protection Mechanism Failure
T1189Drive-by Compromise

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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