CVE-2025-51591Network attack vector

Internal resource disclosure via iframe source fetching

Published Jul 11, 2025 · Updated Jul 5, 2026

SSRF in JGM Pandoc 3.6.4 allows remote attackers to read internal resources when a server converts HTML containing a crafted iframe. The HTML reader resolves the iframe src attribute and fetches the referenced local file or URL while parsing attacker-controlled input. Exposure requires a server application to process untrusted HTML with filesystem or network access, enabling disclosure of resources reachable by that process.

CVSS severity3.7
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 JGM Pandoc 3.6.4 allows remote attackers to read internal resources when a server converts HTML containing a crafted iframe. The HTML reader resolves the iframe src attribute and fetches the referenced local file or URL while parsing attacker-controlled input. Exposure requires a server application to process untrusted HTML with filesystem or network access, enabling disclosure of resources reachable by that process.

The record

CVE
CVE-2025-51591
Published
Jul 11, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.7CISA ADPCVSS:3.1/AV:N/AC:H/PR:N/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
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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