CVE-2023-51639: Allegra downloadExportedChart Directory Traversal Authentication Bypass Vulnerability

Q: How do I fix CVE-2023-51639?

allegra: upgrade to 7.5.1. Exact commands for each OS are on this page.

Q: Is CVE-2023-51639 being exploited?

CVE-2023-51639 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-51639 affect?

CVE-2023-51639 affects allegra. Severity is critical (CVSS 9.8). Allegra downloadExportedChart Directory Traversal Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Allegra. Authentication is not required to exploit this

Q: How urgent is CVE-2023-51639?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-51639 is a critical-severity flaw (CVSS 9.8) affecting allegra. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Allegra downloadExportedChart Directory Traversal Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Allegra. Authentication is not required to exploit this vulnerability. The specific flaw exists within the downloadExportedChart action. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-22
Published	2024-11-22
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: alltena

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-11-22 20:15 UTCPublished CVE record published
2026-06-17 06:41 UTCUpdated Record last modified

alltena allegra UPGRADE

Affected: < 7.5.1

Fixed in: 7.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy allegra || rpm -q allegra || allegra --version

2. UPGRADE to 7.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade allegra

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade allegra

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-51639?

allegra: upgrade to 7.5.1. Exact commands for each OS are on this page.

Is CVE-2023-51639 being exploited?

CVE-2023-51639 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-51639 affect?

CVE-2023-51639 affects allegra. Severity is critical (CVSS 9.8). Allegra downloadExportedChart Directory Traversal Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Allegra. Authentication is not required to exploit this

How urgent is CVE-2023-51639?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-6216 CRITICAL 9.8 UPGRADE Allegra calculateTokenExpDate Password Recovery Authentication Bypass Vulnerability
CVE-2025-3486 HIGH 8.8 UPGRADE Allegra isZipEntryValide Directory Traversal Remote Code Execution Vulnerability
CVE-2025-3485 HIGH 8.8 UPGRADE Allegra extractFileFromZip Directory Traversal Remote Code Execution Vulnerability
CVE-2024-5581 HIGH 7.2 UPGRADE Allegra unzipFile Directory Traversal Remote Code Execution Vulnerability
CVE-2024-5580 HIGH 7.2 UPGRADE Allegra loadFieldMatch Deserialization of Untrusted Data Remote Code Execution Vulnerability

References

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