5.5Medium

CVE-2026-28560wpForo Forum 2.4.14 Stored XSS via Unsafe JSON Encoding in Inline Script

gVectors Team wpForo Forum Published: 2026-03-01 00:47 (8 months ago)

Description

wpForo Forum 2.4.14 contains a stored cross-site scripting vulnerability that allows script injection via forum URL data output into an inline script block using json_encode without the JSON_HEX_TAG flag. Attackers set a forum slug containing a closing script tag or unescaped single quote to break out of the JavaScript string context and execute arbitrary script in all visitors' browsers.

Weakness (CWE): CWE-79

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
gvectors	wpforo forum	2.4 – < 2.4.16
gVectors Team	wpForo Forum	2.4 – < 2.4.16, fixed 2.4.16

References and patches

wpForo Forum WordPress Plugin productProduct
wpForo Forum Contributors & Developers patchRelease Notes
VulnCheck Advisory: wpForo Forum 2.4.14 Stored XSS via Unsafe JSON Encoding in Inline Script third-party-advisoryThird Party Advisory

CPE matches (NVD) (1)

cpe:2.3:a:gvectors:wpforo_forum:*:*:*:*:*:wordpress:*:* ≥ 2.4.0 < 2.4.16

CVSS score

5.5Medium

Source: VulnCheck · CVSS 3.1

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

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

All scores (5)

cna	CVSS 4.0	4.8Medium
cna	CVSS 3.1	5.5Medium
disclosure@vulncheck.com	CVSS 4.0	4.8Medium
disclosure@vulncheck.com	CVSS 3.1	5.5Medium
nvd	CVSS 3.1	4.8Medium

EPSS (chance of exploitation in 30 days)

0.27%

higher than 19% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: partial

Timeline

ID reserved2026-02-28
Published2026-03-01 00:47
Reached IP-DB2026-10-24 23:48
Last updated2026-06-17 13:28

Assigned by (CNA): VulnCheck
NVD status: Analyzed

View at source: CVE.org · NVD

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