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Poppler CVE-2025-43903

MEDIUM
Improper Verification of Cryptographic Signature (CWE-347)
2025-04-18 cve@mitre.org
Information Disclosure Red Hat Jwt Attack Poppler Suse Freedesktop
4.3
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-347
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Signature verification
Impact

CVSS score of 4.3 (MEDIUM). Attack characteristics: local attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.04%.
Exploit ScenarioDerived

Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

NSSCryptoSignBackend.cc in Poppler before 25.04.0 does not verify the adbe.pkcs7.sha1 signatures on documents, resulting in potential signature forgeries. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-347. NSSCryptoSignBackend.cc in Poppler before 25.04.0 does not verify the adbe.pkcs7.sha1 signatures on documents, resulting in potential signature forgeries. Affected products include: Freedesktop Poppler. Version information: before 25.04.0.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 4.3 MEDIUM
AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
SUSE MEDIUM
Red Hat 4.3 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

2
Patch released
Mar 28, 2026 - 18:37 nvd
Patch available
CVE Published
Apr 18, 2025 - 21:15 nvd
MEDIUM 4.3

DescriptionCVE.org

NSSCryptoSignBackend.cc in Poppler before 25.04.0 does not verify the adbe.pkcs7.sha1 signatures on documents, resulting in potential signature forgeries.

Executive ViewAI

Why It Matters

Organizations using Poppler should be aware of moderate risk from CVE-2025-43903, a signature bypass vulnerability rated CVSS 4.3. Exploitation could compromise the security of affected deployments. A patch is available and should be applied during regular vulnerability management.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.0%
Top 87% exploitable
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS Vendor

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact
Low

Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +22
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:freedesktop:poppler:*:*:*:*:*:*:*:*

More in Poppler

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Format string vulnerability in the extractPages function in utils/pdfseparate.cc in poppler before 0.24.3 allows remote

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8.8 Jul 12

An exploitable integer overflow vulnerability exists in the JPEG 2000 image parsing functionality of freedesktop.org Pop
CVE-2017-15565 HIGH POC
8.8 Oct 17

In Poppler 0.59.0, a NULL Pointer Dereference exists in the GfxImageColorMap::getGrayLine() function in GfxState.cc via

CVE-2019-12293 HIGH POC
8.8 May 23

In Poppler through 0.76.1, there is a heap-based buffer over-read in JPXStream::init in JPEG2000Stream.cc via data with

CVE-2019-10872 HIGH POC
8.8 Apr 05

An issue was discovered in Poppler 0.74.0. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, n
CVE-2019-9545 HIGH POC
8.8 Mar 01

An issue was discovered in Poppler 0.74.0. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, n
CVE-2019-9543 HIGH POC
8.8 Mar 01

An issue was discovered in Poppler 0.74.0. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, n
CVE-2019-9200 HIGH POC
8.8 Feb 26

A heap-based buffer underwrite exists in ImageStream::getLine() located at Stream.cc in Poppler 0.74.0 that can (for exa
CVE-2013-4473 HIGH POC
7.5 Nov 23

Stack-based buffer overflow in the extractPages function in utils/pdfseparate.cc in poppler before 0.24.2 allows remote

CVE-2017-14518 HIGH POC
7.8 Sep 17

In Poppler 0.59.0, a floating point exception exists in the isImageInterpolationRequired() function in Splash.cc via a c
CVE-2017-14520 HIGH POC
7.8 Sep 17

In Poppler 0.59.0, a floating point exception occurs in Splash::scaleImageYuXd() in Splash.cc, which may lead to a poten
CVE-2022-38784 HIGH POC
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Poppler prior to and including 22.08.0 contains an integer overflow in the JBIG2 decoder (JBIG2Stream::readTextRegionSeg

Same weakness CWE-347 – Improper Verification of Cryptographic Signature

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Same technique Information Disclosure

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CVE-2025-24813 CRITICAL POC
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CVE-2025-68613 HIGH POC
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CVE-2015-1701 HIGH POC
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CVE-2017-0147 HIGH POC
7.5

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP6 SUSE Linux Enterprise High Performance Computing 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP6 Fixed
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP6 Fixed
openSUSE Leap 15.6 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed

References

Advisories & patches
PATCH https://gitlab.freedesktop.org/poppler/poppler/-/commit/f1b9c830f145a0042e853d6462b2f9ca4016c669 ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:1434/

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