CVE-2025-55311Network attack vector

Signature validation bypass via cleared modification status

Published Dec 11, 2025 · Updated Dec 11, 2025

Signature validation bypass in Foxit PDF Reader before 2025.2 and PDF Editor before 13.2 or 2025.2 allows remote attackers to conceal changes. Crafted PDF JavaScript alters annotation content and then clears the file modification status without triggering proper cryptographic signature revalidation. A user must open the crafted signed PDF; the displayed signature state can misrepresent document integrity, with no reported confidentiality or availability impact.

CVSS severity6.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Signature validation bypass in Foxit PDF Reader before 2025.2 and PDF Editor before 13.2 or 2025.2 allows remote attackers to conceal changes. Crafted PDF JavaScript alters annotation content and then clears the file modification status without triggering proper cryptographic signature revalidation. A user must open the crafted signed PDF; the displayed signature state can misrepresent document integrity, with no reported confidentiality or availability impact.

The record

CVE
CVE-2025-55311
Published
Dec 11, 2025
Updated
Dec 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-347, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 11, 2025Record 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

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
6.5Foxit SoftwareCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1565.001Stored Data Manipulation

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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