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NVD / CVE Program· CNA snyk

CVE-2024-21545: Proxmox Virtual Environment is an open-source server management platform for enterprise virtualization.

Noroxi assessment

Priority: Monitor (action score 32/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.36% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Proxmox libpve-common-perl (Promox Mail Gateway 8) 8.2.5; Proxmox libpve-common-perl (Promox VE 8) 8.2.3; Proxmox libpve-http-server-perl 4.3.0, 5.1.1.

Low priority for now. Upgrade to Proxmox libpve-common-perl (Promox Mail Gateway 8) 8.2.5; Proxmox libpve-common-perl (Promox VE 8) 8.2.3; Proxmox libpve-http-server-perl 4.3.0, 5.1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Proxmox Virtual Environment is an open-source server management platform for enterprise virtualization. Insufficient safeguards against malicious API response values allow authenticated attackers with 'Sys.Audit' or 'VM.Monitor' privileges to download arbitrary host files via the API. When handling the result from a request handler before returning it to the user, the handle_api2_request function will check for the ‘download’ or ‘data’->’download’ objects inside the request handler call response object. If present, handle_api2_request will read a local file defined by this object and return it to the user. Two endpoints were identified which can control the object returned by a request handler sufficiently that the ’download’ object is defined and user controlled. This results in arbitrary file read. The privileges of this file read can result in full compromise of the system by various impacts such as disclosing sensitive files allowing for privileged session forgery.

HighCVSS 8.2 · v3.1—Proof of concept Fix available
Published
Sep 24, 2024
Updated
Jun 17, 2026
EPSS
0.3% · 30th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · snyk
8.2
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
proxmoxmail gateway
proxmoxvirtual environment

Versions reported by the vendor

Affected version ranges reported by the assigning authority (snyk). Independent of NVD's CPE analysis and usually ahead of it.

  • Proxmox libpve-common-perl (Promox Mail Gateway 8)

    • before 8.2.5affected · semver

  • Proxmox libpve-common-perl (Promox VE 8)

    • before 8.2.3affected · semver

  • Proxmox libpve-http-server-perl

    • 3.2-1 and later · before 4.3.0affected · semver
    • 5.0.0 and later · before 5.1.1affected · semver

  • Proxmox libpve-storage-perl

    • before 7.4-4affected · semver
    • 8.0.0 and later · before 8.2.5affected · semver

  • Proxmox pmg-api

    • before 7.3-12affected · semver
    • 8.0.0 and later · before 8.1.4affected · semver

  • Proxmox pve-manager

    • before 7.4-19affected · semver
    • 8.0.0 and later · before 8.2.7affected · semver

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Proxmox libpve-common-perl (Promox Mail Gateway 8)8.2.5Vendor (CNA)
Proxmox libpve-common-perl (Promox VE 8)8.2.3Vendor (CNA)
Proxmox libpve-http-server-perl4.3.0Vendor (CNA)
Proxmox libpve-http-server-perl5.1.1Vendor (CNA)
Proxmox libpve-storage-perl7.4-4Vendor (CNA)
Proxmox libpve-storage-perl8.2.5Vendor (CNA)
Proxmox pmg-api7.3-12Vendor (CNA)
Proxmox pmg-api8.1.4Vendor (CNA)
Proxmox pve-manager7.4-19Vendor (CNA)
Proxmox pve-manager8.2.7Vendor (CNA)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:12025-11-30

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+431 d
  3. TodayNov 9, 2026+775 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-73 · External Control of File Name or Path

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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