CVE-2025-43903 Security feature bypass in Poppler
Attackers can forge digital signatures in PDF documents because the library fails to verify specific PKCS7 signatures, compromising document integrity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-43903?
CVE-2025-43903 is a medium-severity vulnerability in Freedesktop Poppler, published on 18 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
NSSCryptoSignBackend.cc in Poppler before 25.04.0 does not verify the adbe.pkcs7.sha1 signatures on documents, resulting in potential signature forgeries.
Weakness: CWE-347
Which versions are affected by CVE-2025-43903?
It affects 1 product.
Linux distribution packages (7)
poppler SUSE:Linux Enterprise Module for Basesystem 15 SP6 | All versions | 24.03.0-150600.3.13.1 |
poppler SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 24.03.0-150600.3.13.1 |
poppler-qt5 SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 24.03.0-150600.3.13.1 |
poppler-qt6 SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 24.03.0-150600.3.13.1 |
poppler openSUSE:Leap 15.6 | All versions | 24.03.0-150600.3.13.1 |
poppler-qt5 openSUSE:Leap 15.6 | All versions | 24.03.0-150600.3.13.1 |
poppler-qt6 openSUSE:Leap 15.6 | All versions | 24.03.0-150600.3.13.1 |
Products include Freedesktop Poppler.
How do I fix CVE-2025-43903?
Upgrade to a fixed version.
Is CVE-2025-43903 being exploited?
There is no known exploitation of CVE-2025-43903 in the wild and no public exploit code.
Other vulnerabilities in Freedesktop Poppler
Sources
Also known as CLSA-2026-1784038553, CLSA-2026-1784899428, DEBIAN-CVE-2025-43903, ECHO-9071-56c9-378a, GHSA-4w9g-4h2x-7qxq, JLSEC-2026-87 and 9 more.