CVE-2024-39307Public exploitNetwork attack vector

Stored script execution via unsandboxed EPUB content

Published Jun 28, 2024 · Updated Aug 2, 2024

Stored cross-site scripting in Kareadita Kavita 0.8.0 and earlier allows attackers to run script when a user opens a crafted EPUB. The EPUB reader places book content into the browsing context without sanitizing scripts or applying an iframe sandbox, so embedded JavaScript runs with the active Kavita session. Exploitation requires a logged-in user to open the malicious book; the script can perform that user’s permitted API actions, including reading configured email credentials in the demonstrated case.

CVSS severity3.5
Low
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Kareadita Kavita 0.8.0 and earlier allows attackers to run script when a user opens a crafted EPUB. The EPUB reader places book content into the browsing context without sanitizing scripts or applying an iframe sandbox, so embedded JavaScript runs with the active Kavita session. Exploitation requires a logged-in user to open the malicious book; the script can perform that user’s permitted API actions, including reading configured email credentials in the demonstrated case.

The record

CVE
CVE-2024-39307
Published
Jun 28, 2024
Updated
Aug 2, 2024
Vendor
Kareadita
Product
Kavita
Classifications
CWE-79, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=<= 0.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kareadita · Kavitaversion=<= 0.8.0

Published CVSS scores

3.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.002User Execution: Malicious File

Public exploit references

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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