Description
Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. Versions starting in 2.1.5 and prior to 2.5.2 have Denial of Service (DoS) vulnerability in the Stirling-PDF watermark functionality (`/api/v1/security/add-watermark` endpoint). The vulnerability allows authenticated users to cause resource exhaustion and server crashes by providing extreme values for the `fontSize` and `widthSpacer` parameters. Version 2.5.2 patches the issue.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-3932-2rfq-87xm
Scores
CVSS v3
6.5
EPSS
0.0002
EPSS Percentile
5.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (2)
stirling/stirling_pdf
2.1.5 - 2.5.2
Stirling-Tools/Stirling-PDF
>= 2.1.5, < 2.5.2
Published
Mar 26, 2026
Tracked Since
Mar 26, 2026