How severe is CVE-2026-28560?

CVE-2026-28560 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-28560 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28560?

CVE-2026-28560 affects Gvectors Wpforo Forum. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28560?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-28560 have an EU (EUVD) identifier?

Yes. CVE-2026-28560 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9109.

When was CVE-2026-28560 published?

CVE-2026-28560 was published on 2026-02-28 and last updated on 2026-06-17.

CVE-2026-28560

CVE-2026-28560 is a medium-severity vulnerability in Gvectors Wpforo Forum with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 4.8
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9109
Weakness: CWE-79
Affected product: Gvectors Wpforo Forum
Published: 2026-02-28
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-28560?: 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.
How severe is CVE-2026-28560?: CVE-2026-28560 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-28560 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28560?: CVE-2026-28560 affects Gvectors Wpforo Forum. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28560?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-28560 have an EU (EUVD) identifier?: Yes. CVE-2026-28560 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9109.
When was CVE-2026-28560 published?: CVE-2026-28560 was published on 2026-02-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gvectors:wpforo_forum:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Gvectors Wpforo Forum

CVE-2024-3200 — Critical (CVSS 9.9): The wpForo Forum plugin for WordPress is vulnerable to SQL Injection via the 'slug' attribute of the 'wpforo' shortcode…
CVE-2022-40200 — Critical (CVSS 9.9): Auth. (subscriber+) Arbitrary File Upload vulnerability in wpForo Forum plugin <= 2.0.9 on WordPress.
CVE-2018-16613 — Critical (CVSS 9.8): An issue was discovered in the update function in the wpForo Forum plugin before 1.5.2 for WordPress. A registered…
CVE-2023-2249 — High (CVSS 8.8): The wpForo Forum plugin for WordPress is vulnerable to Local File Include, Server-Side Request Forgery, and PHAR…
CVE-2022-38144 — High (CVSS 8.8): Cross-Site Request Forgery (CSRF) vulnerability in gVectors Team wpForo Forum plugin <= 2.0.5 at WordPress.
CVE-2026-28562 — High (CVSS 8.2): wpForo 2.4.14 contains an unauthenticated SQL injection vulnerability in Topics::get_topics() where the ORDER BY clause…

All CVEs affecting Gvectors Wpforo Forum →

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

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →