CVE-2023-44763

mediumpriority · track · 32EPSS 0.007 · 54 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.71% (54th) EPSS

CVSS 5.4 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-28

Concrete CMS v9.2.1 is affected by an Arbitrary File Upload vulnerability via a Thumbnail file upload, which allows Cross-Site Scripting (XSS). NOTE: the vendor's position is that a customer is supposed to know that "pdf" should be excluded from the allowed file types, even though pdf is one of the allowed file types in the default configuration.

cvss

Technical severity, 0–10. One row per scoring source.

5.4

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nsecondary · OSV

v3.15.1mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-434USprimaryCWE-434USCWE-79US

exploits (1)

Public proof-of-concept and weaponised exploit code.

sromanhu/CVE-2023-44763_ConcreteCMS-Arbitrary-file-upload-ThumbnailConcreteCMS v.9.2.1 is affected by Arbitrary File Upload vulnerability that allows Cross-Site Scriting (XSS) Stored.PoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
concretecms concrete cms= 9.2.1nvdUScpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*
Packagist concrete5/concrete5≤ 9.2.1osvUSpkg:composer/concrete5/concrete5

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-wrp2-6v6j-hfmgConcreteCMS vulnerable to Stored Cross-site Scripting2023-10-10ghsa · osvUS
Concrete CMS v9.2.1 is affected by Arbitrary File Upload vulnerability via the Thumbnail file upload, which allows Cross-Site Scripting (XSS).

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2023-10-10modified 2026-06-17

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+5032 more

references (12)

External citations — patches, advisories, analysis.

scry

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