CVE-2024-21527Public exploitNetwork attack vector

Unauthenticated local file read via permissive Chromium deny-list

Published Jul 19, 2024 · Updated Jul 8, 2026

SSRF in Gotenberg before 8.1.0 allows remote attackers to read container files through its Chromium HTML-conversion endpoint. The /convert/html route renders uploaded HTML whose localhost-style iframe source bypasses the default --chromium-deny-list, causing Chromium to embed the referenced file in the returned PDF. No authentication or user interaction is required; HTTP API reachability and the vulnerable default filter permit disclosure of files accessible inside the container.

CVSS severity8.2
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Gotenberg before 8.1.0 allows remote attackers to read container files through its Chromium HTML-conversion endpoint. The /convert/html route renders uploaded HTML whose localhost-style iframe source bypasses the default --chromium-deny-list, causing Chromium to embed the referenced file in the returned PDF. No authentication or user interaction is required; HTTP API reachability and the vulnerable default filter permit disclosure of files accessible inside the container.

The record

CVE
CVE-2024-21527
Published
Jul 19, 2024
Updated
Jul 8, 2026
Vendor
Gotenberg
Product
Gotenberg
Classifications
CWE-918, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2026Record 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 <8.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gotenberg · Gotenbergversion=0 <8.1.0

Published CVSS scores

7.8SnykCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
8.2SnykCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1005Data from Local System

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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