CVE-2015-8684 — Exponent CMS before 2.3.7 does not properly restrict the types of files that can be uploaded, which allows remote attackers to conduct cross-site scripting (XSS) attacks and possibly have other unspecified impact as demonstrated by uploading a file with an .html extension, then accessing it via the elFinder functionality

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MEDIUM

Exponent CMS before 2.3.7 does not properly restrict the types of files that can be uploaded, which allows remote attackers to conduct cross-site scripting (XSS) attacks and possibly have other unspecified impact as demonstrated by uploading a file with an .html extension, then accessing it via the elFinder functionality

Published Jan 18, 2017

6.1

MEDIUM

CVSS 3.0

EPSS 1.23%

Description

Exponent CMS before 2.3.7 does not properly restrict the types of files that can be uploaded, which allows remote attackers to conduct cross-site scripting (XSS) attacks and possibly have other unspecified impact as demonstrated by uploading a file with an .html extension, then accessing it via the elFinder functionality.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.23% 0.01233

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01233

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.23% (0.01233)	67.92th	v5 (v2026.06.15)
Jun 15, 2026	1.22% (0.01223)	64.73th	v5 (v2026.06.15)
Mar 17, 2025	0.24% (0.00239)	45.03th	v4 (v2025.03.14)
Dec 12, 2024	0.10% (0.00098)	42.59th	v3 (v2023.03.01)
Jul 3, 2024	0.10% (0.00098)	41.25th	v3 (v2023.03.01)
Mar 7, 2023	0.10% (0.00098)	39.24th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Sep 17, 2022	1.05% (0.01055)	50.47th	v2 (v2022.01.01)
Apr 1, 2022	1.05% (0.01055)	48.43th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (2)

https://exponentcms.lighthouseapp.com/projects/61783/tickets/1323-exponent-cms-235-file-upload-cross-site-scripting-vulnerability
x_refsource_CONFIRMVendor Advisory
https://packetstormsecurity.com/files/136762/Exponent-CMS-2.3.5-File-Upload-Cross-Site-Scripting.html
x_refsource_MISCThird Party AdvisoryVDB Entry

Link	Providers	Tags
https://exponentcms.lighthouseapp.com/projects/61783/tickets/1323-exponent-cms-235-file-upload-cross-site-scripting-vulnerability		x_refsource_CONFIRMVendor Advisory
https://packetstormsecurity.com/files/136762/Exponent-CMS-2.3.5-File-Upload-Cross-Site-Scripting.html		x_refsource_MISCThird Party AdvisoryVDB Entry

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Jan 18, 2017

Updated Aug 6, 2024

Reserved Dec 26, 2015

Link CVE-2015-8684

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2015-8684

Red Hat

Severity n/a

Public date n/a

Links CVE-2015-8684