CVE-2023-51451Network attack vector

Internal HTTP response disclosure via malformed protocol

Published Dec 22, 2023 · Updated Aug 2, 2024

SSRF in Sentry Symbolicator 0.3.3 through 23.12.0 allows remote authenticated users to read internal HTTP responses via crafted URLs. The source-fetching path accepts a URL with an invalid protocol and passes it to the HTTP client, which issues a GET request to the embedded internal address. A registered Sentry account and enabled JavaScript source fetching or an untrusted public repository provide the path that exposes response data through Symbolicator and Sentry interfaces.

CVSS severity4.3
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Sentry Symbolicator 0.3.3 through 23.12.0 allows remote authenticated users to read internal HTTP responses via crafted URLs. The source-fetching path accepts a URL with an invalid protocol and passes it to the HTTP client, which issues a GET request to the embedded internal address. A registered Sentry account and enabled JavaScript source fetching or an untrusted public repository provide the path that exposes response data through Symbolicator and Sentry interfaces.

The record

CVE
CVE-2023-51451
Published
Dec 22, 2023
Updated
Aug 2, 2024
Vendor
Sentry
Product
Symbolicator
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 22, 2023CVE 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=>= 0.3.3, < 23.12.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sentry · Symbolicatorversion=>= 0.3.3, < 23.12.1

Published CVSS scores

4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

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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