XpressEngine XE3 Image File unrestricted upload

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in XpressEngine XE3. Impacted is an unknown function of the component Image File Handler. The manipulation leads to unrestricted upload. This vulnerability is traded as CVE-2021-26642. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in XpressEngine XE3 (affected version unknown). It has been rated as critical. This issue affects an unknown functionality of the component Image File Handler. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

When uploading an image file to a bulletin board developed with XpressEngine, a vulnerability in which an arbitrary file can be uploaded due to insufficient verification of the file. A remote attacker can use this vulnerability to execute arbitrary code on the server where the bulletin board is running.

The weakness was shared 01/21/2023. It is possible to read the advisory at boho.or.kr. The identification of this vulnerability is CVE-2021-26642 since 02/03/2021. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-0413). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector (KrCERT/CC): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Unrestricted upload
CWE: CWE-434 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/03/2021 🔍
01/20/2023 +716 days 🔍
01/21/2023 +0 days 🔍
07/03/2025 +894 days 🔍

Sourcesinfo

Advisory: boho.or.kr
Status: Not defined

CVE: CVE-2021-26642 (🔍)
GCVE (CVE): GCVE-0-2021-26642
GCVE (VulDB): GCVE-100-219059
EUVD: 🔍

Entryinfo

Created: 01/21/2023 00:37
Updated: 07/03/2025 12:00
Changes: 01/21/2023 00:37 (46), 02/15/2023 17:46 (11), 07/03/2025 12:00 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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