CVE-2023-4624Public exploitNetwork attack vector

Server-side request forgery via unchecked webhook endpoints

Published Aug 30, 2023 · Updated Oct 1, 2024

SSRF in BookStack before 23.08 allows remote authenticated users with administrator access to issue server-side requests through webhooks. DispatchWebhookJob sends the configured endpoint with Laravel's HTTP client without validating the URL against an allowed-host policy. Administrator access and a webhook-triggering event are required; the reported consequence is limited disclosure from server-reachable resources.

CVSS severity2.4
Low
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in BookStack before 23.08 allows remote authenticated users with administrator access to issue server-side requests through webhooks. DispatchWebhookJob sends the configured endpoint with Laravel's HTTP client without validating the URL against an allowed-host policy. Administrator access and a webhook-triggering event are required; the reported consequence is limited disclosure from server-reachable resources.

The record

CVE
CVE-2023-4624
Published
Aug 30, 2023
Updated
Oct 1, 2024
Vendor
BookStack
Product
BookStack
Classifications
CWE-918
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=unspecified <v23.08

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

BookStack · BookStackversion=unspecified <v23.08

Published CVSS scores

2.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N
2.4huntr.devCVSS:3.0/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

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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