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Fencer Vulns
medium 4.3

CVE-2025-43903 json

NSSCryptoSignBackend.cc in Poppler before 25.04.0 does not verify the adbe.pkcs7.sha1 signatures on...

published 2025-04-18 18 mo ago modified 2026-07-25 3 mo ago also EUVD-2025-11892 , GHSA-4w9g-4h2x-7qxq , JLSEC-2026-87

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

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

Patch / fix

  • julia Poppler_jll 25.10.0+0
  • freedesktop Poppler 25.04.0
  • poppler Debian 12 22.12.0-2+deb12u3
  • poppler Debian 14, Debian 13 25.03.0-4

debian advisories DEBIAN-CVE-2025-43903

  • poppler Ubuntu 20.04 LTS 0.86.1-0ubuntu1.7
  • poppler Ubuntu 22.04 LTS 22.02.0-2ubuntu0.8
  • poppler Ubuntu 24.04 LTS 24.02.0-1ubuntu9.4
  • poppler Ubuntu Pro 18.04 LTS 0.62.0-2ubuntu2.14+esm6

ubuntu advisories UBUNTU-CVE-2025-43903

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • poppler SLE Module for Package Hub 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 24.03.0-150600.3.13.1
  • poppler-qt5 SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 24.03.0-150600.3.13.1
  • poppler-qt6 SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 24.03.0-150600.3.13.1

suse advisories SUSE-SU-2025:1434-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-43903 updated cvss 4.3

poppler: SignatureValue not checked within SignerInfo

  • Red Hat Enterprise Linux 6 poppler, poppler-qt, poppler-qt4, poppler-glib, poppler-utils Red Hat Enterprise Linux 7 poppler, poppler-qt, poppler-cpp, poppler-glib, poppler-demos, poppler-utils Red Hat Enterprise Linux 8 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils Red Hat Enterprise Linux 9 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils Red Hat Enterprise Linux 10 poppler
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
NVD 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
OSV 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
julia Poppler_jll
<25.10.0+0
25.10.0+0

Affected products

  • freedesktop Poppler

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.