Vulnerability · Published May 12, 2026 · Assigned by GitHub_M

CVE-2026-44260efw4.X: readonly Flag Not Enforced Server-Side

High 8.1

In plain English

A high-severity incorrect authorization in efw4.X from efwGrp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.4%top 70.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, the readonly flag set on the <efw:elFinder> JSP tag is intended to prevent file modifications. When protected=true, elfinder_checkRisk enforces that the client sends readonly=true (matching the session value), but no event handler checks the readonly value before performing write operations. The flag only controls client-side UI elements (disabling buttons) and response metadata (write: 0, locked: 1). An attacker who sends requests directly (bypassing the UI) can perform all file operations despite readonly=true. This vulnerability is fixed in 4.08.010.

Affected products (as reported)

Vendor	Product	Versions
efwGrp	efw4.X	< 4.08.010

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

https://github.com/efwGrp/efw4.X/security/advisories/GHSA-5454-qhrf-vcvh x_refsource_CONFIRM