How severe is CVE-2026-21625?

CVE-2026-21625 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-21625 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21625?

CVE-2026-21625 affects Stackideas Easydiscuss. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21625?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-21625 have an EU (EUVD) identifier?

Yes. CVE-2026-21625 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2937.

When was CVE-2026-21625 published?

CVE-2026-21625 was published on 2026-01-16 and last updated on 2026-06-17.

CVE-2026-21625

CVE-2026-21625 is a high-severity vulnerability in Stackideas Easydiscuss with a CVSS 3.x base score of 8.8. 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-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 4.8
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2937
Weakness: CWE-434
Affected product: Stackideas Easydiscuss
Published: 2026-01-16
Last modified: 2026-06-17

Description

User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by file extensions, no mime type checks are happening.

Frequently asked questions

What is CVE-2026-21625?: User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by file extensions, no mime type checks are happening.
How severe is CVE-2026-21625?: CVE-2026-21625 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-21625 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21625?: CVE-2026-21625 affects Stackideas Easydiscuss. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21625?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-21625 have an EU (EUVD) identifier?: Yes. CVE-2026-21625 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2937.
When was CVE-2026-21625 published?: CVE-2026-21625 was published on 2026-01-16 and last updated on 2026-06-17.

References

https://stackideas.com/easydiscuss

Affected products (1)

cpe:2.3:a:stackideas:easydiscuss:*:*:*:*:*:joomla\!:*:*

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CVE-2018-5263 — Medium (CVSS 5.4): The StackIdeas EasyDiscuss (aka com_easydiscuss) extension before 4.0.21 for Joomla! allows XSS.

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