What is CVE-2025-43903?

CVE-2025-43903 is a medium-severity vulnerability in Freedesktop Poppler, classified under Improper Verification of Cryptographic Signature. CVSS score: 4.3/10. Published 2025-04-18.

How severe is CVE-2025-43903?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Freedesktop Poppler

CVE-2025-43903

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

Published 2025-04-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.3th percentile), scored 2026-09-28.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Freedesktop Poppler — versions 0

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

gitlab.freedesktop.org/poppler/poppler/-/commit/f1b9c830f145a0042e853d6462b2f9c… (Patch)

Frequently asked questions

What is CVE-2025-43903?: CVE-2025-43903 is a medium-severity vulnerability in Freedesktop Poppler, classified under Improper Verification of Cryptographic Signature. CVSS score: 4.3/10. Published 2025-04-18.
How severe is CVE-2025-43903?: Medium severity. CVSS v3 base score is 4.3 out of 10.