CVE-2023-45966Public exploitNetwork attack vector

Information disclosure via unrestricted locator URL fetching

Published Oct 23, 2023 · Updated Sep 12, 2024

Blind SSRF in Remark42 1.12.1 and earlier allows remote attackers to trigger server-side requests through crafted comment JSON. The /api/v1/comment handler passes a locator URL to TitleExtractor when the title is absent or sanitized, and the extractor fetches that attacker-controlled URL without restricting it to configured site domains. Posting comments must be permitted for the target site; successful exploitation discloses information through blind outbound requests rather than direct response content.

CVSS severity7.5
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Blind SSRF in Remark42 1.12.1 and earlier allows remote attackers to trigger server-side requests through crafted comment JSON. The /api/v1/comment handler passes a locator URL to TitleExtractor when the title is absent or sanitized, and the extractor fetches that attacker-controlled URL without restricting it to configured site domains. Posting comments must be permitted for the target site; successful exploitation discloses information through blind outbound requests rather than direct response content.

The record

CVE
CVE-2023-45966
Published
Oct 23, 2023
Updated
Sep 12, 2024
Vendor
Remark42
Product
Remark42
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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 <=1.12.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Remark42 · Remark42version=0 <=1.12.1

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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