CVE-2025-56589
Published: 22 January 2026
Summary
CVE-2025-56589 is a high-severity SSRF (CWE-918) vulnerability in Apryse Html2Pdf. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 22.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-56589 describes a Local File Inclusion (LFI) and Server-Side Request Forgery (SSRF) vulnerability in the InsertFromHtmlString() function of the Apryse HTML2PDF SDK through version 11.6.0. These flaws enable attackers to read local files on the affected server or initiate arbitrary HTTP requests to internal or external services. Published on 2026-01-22, the vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) and is associated with CWE-918.
A remote, unauthenticated attacker can exploit this vulnerability over the network with low complexity and no user interaction required. Successful exploitation allows reading of local server files via LFI or forging requests via SSRF, potentially leading to sensitive data disclosure or system takeover.
Advisories and additional details are available from Apryse at http://apryse.com and Stratascale at https://www.stratascale.com/resource/apryse-server-module-ssrf-lfi/. Security practitioners should consult these resources for patch information and mitigation guidance specific to the Apryse HTML2PDF SDK.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-4088
Vulnerability details
A Local File Inclusion (LFI) and a Server-Side Request Forgery (SSRF) vulnerability was found in the InsertFromHtmlString() function of the Apryse HTML2PDF SDK thru 11.6.0. These vulnerabilities could allow an attacker to read local files on the server or make…
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arbitrary HTTP requests to internal or external services. Both vulnerabilities could lead to the disclosure of sensitive data or potential system takeover.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
LFI directly enables reading arbitrary local files (T1005); the flaw in a server-side SDK component is a classic public-facing application exploit vector (T1190).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Flaw remediation directly addresses the CVE by patching the Apryse HTML2PDF SDK beyond version 11.6.0 to fix the LFI and SSRF vulnerabilities in InsertFromHtmlString().
Information input validation on HTML strings passed to InsertFromHtmlString() prevents exploitation via malicious paths for LFI and URLs for SSRF.
Information flow enforcement restricts unauthorized file reads from LFI and outbound HTTP requests from SSRF within the system.