Insecure Direct Object Reference (IDOR) vulnerability in eSignaViewer

published 2025-05-15 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-15151

cvss: 2.0; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits: 0; none known

Insecure Direct Object Reference (IDOR) vulnerability in the eSignaViewer component in eSigna product versions 1.0 to 1.5 on all platforms allow an unauthenticated attacker to access arbitrary files in the document system via manipulation of file paths and object identifiers.

Patch / fix

fixed in 1

Lleidanet PKI eSigna 1.3.2, 1.4.4, 4.0.4, 4.1.4, 5.0.2, 5.1.2, 5.2.4, 5.3.3, 5.4.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 17 mo ago (2025-05-15)

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.0	CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
CNA	4.0	2.0	CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Lleidanet PKI eSigna

Classification

Weakness

CWE-20 Improper Input Validation

References

edgewatch.com /vulnerability-advisories/path-traversal-and-idor-vulnerabilities-in-esignaviewer-allow-unauthorized-file-acce

Sources

CVE List CVE-2025-4762
NVD CVE-2025-4762

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary