Is PDF.js Viewer safe?

No known vulnerability affects the current version (3.2.0). 3 issues were found in earlier versions and fixed, the latest disclosed on May 14, 2024.

Checked 5 days ago against the WPVulnerability database, for version 3.2.0.

How it’s looked after

Last release: Oct 26, 2026 (2 weeks ago)
Releases in the last year: 9
Tested up to: WordPress 7.0.8
Support resolved: 0 of 2 threads in two months
Active installs: 20K+

3 known vulnerabilities

2 medium
1 not rated

None affects the current version.

Disclosed each year

20211
20231
20241

Every known vulnerability in PDF.js Viewer

Newest first, with any that affect the current version at the top.

Arbitrary JavaScript Execution
Fixed in 2.2 · CVE-2024-4367 · May 14, 2024 · Wordfence
medium
Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
Fixed in 2.1.8 · CVE-2022-4670 · Jan 10, 2023 · Wordfence
medium
Authenticated (Contributor+) Stored Cross-Site Scripting
Fixed in 2.0.2 · CVE-2021-24759 · Aug 11, 2021 · Wordfence

Questions about PDF.js Viewer’s security

Is PDF.js Viewer safe to use?

No known vulnerability affects its current version. Earlier versions had issues that are now fixed, so keep PDF.js Viewer updated: most attacks target sites that haven’t updated.

Does PDF.js Viewer have known security vulnerabilities?

None that affect the current version. WPVulnerability’s database lists 3 older issues, fixed in earlier versions, so keep PDF.js Viewer up to date.

Is PDF.js Viewer still maintained?

Yes. Its last release was 2 weeks ago. Its authors resolved 0 of the 2 support threads opened in the last two months.

Is PDF.js Viewer compatible with the latest WordPress?

It’s tested up to WordPress 7.0.8, one version behind the current 7.1. Authors often update this line a few weeks after a release.

Hear about the next one first

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Vulnerability data from WPVulnerability (CC0), which gathers records from CVE, Wordfence, Patchstack and WPScan. A clean record isn’t a guarantee: keep every plugin updated.