Allegra uploadSimpleFile Directory Traversal Remote Code Execution Vulnerability

published 2024-11-22 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2023-56358

cvss: 7.2; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 79%
public exploits: 0; none known

Allegra uploadSimpleFile Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Allegra. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the uploadSimpleFile method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of LOCAL SERVICE. Was ZDI-CAN-22527.

Patch / fix

fixed in 1

alltena allegra 7.5.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 23 mo ago (2024-11-25)

Exploit prediction

1.84% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	7.2	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Affected products

Allegra Allegra
alltena allegra

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

trackplus.com /en/service/release-notes-reader/7-5-1-release-notes-2.html
vendor-advisory, release-notes
zerodayinitiative.com /advisories/ZDI-24-109/
third-party-advisory

Sources

CVE List CVE-2023-51646
NVD CVE-2023-51646

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