What is the CVSS score of CVE-2026-28558?

CVE-2026-28558 has a CVSS 3.1 base score of 6.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Wpforo Forum are affected by CVE-2026-28558?

Organizations using wpForo Forum 2.4.14 should be aware of moderate risk from CVE-2026-28558, a cross-site scripting vulnerability rated CVSS 6.4.

How to fix or mitigate CVE-2026-28558?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Wpforo Forum CVE-2026-28558

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-28 disclosure@vulncheck.com

XSS Wpforo Forum

6.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.4 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 28, 2026 - 22:16 nvd

MEDIUM 6.4

DescriptionCVE.org

wpForo Forum 2.4.14 contains a stored cross-site scripting vulnerability that allows authenticated subscribers to upload SVG files as profile avatars through the avatar upload functionality. Attackers upload a crafted SVG containing CSS injection or JavaScript event handlers that execute in the browsers of any user who views the attacker's profile page.

AnalysisAI

Stored XSS in wpForo Forum 2.4.14 allows authenticated users to inject malicious code through SVG profile avatars, which executes when other users view the attacker's profile. An authenticated attacker can leverage this to steal session tokens, redirect victims, or perform actions on their behalf with no user interaction required. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.4 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-28558 vulnerability details – vuln.today

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