How severe is CVE-2026-21626?

CVE-2026-21626 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-21626 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21626?

CVE-2026-21626 affects Stackideas Easydiscuss. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21626?

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-2026-21626 have an EU (EUVD) identifier?

Yes. CVE-2026-21626 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5682.

When was CVE-2026-21626 published?

CVE-2026-21626 was published on 2026-02-06 and last updated on 2026-06-17.

CVE-2026-21626

CVE-2026-21626 is a high-severity vulnerability in Stackideas Easydiscuss with a CVSS 3.x base score of 7.5. 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.2
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5682
Weakness: CWE-200
Affected product: Stackideas Easydiscuss
Published: 2026-02-06
Last modified: 2026-06-17

Description

Access control settings for forum post custom fields are not applied to the JSON output type, leading to an ACL violation vector an information disclosure

Frequently asked questions

What is CVE-2026-21626?: Access control settings for forum post custom fields are not applied to the JSON output type, leading to an ACL violation vector an information disclosure
How severe is CVE-2026-21626?: CVE-2026-21626 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-21626 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21626?: CVE-2026-21626 affects Stackideas Easydiscuss. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21626?: 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-2026-21626 have an EU (EUVD) identifier?: Yes. CVE-2026-21626 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5682.
When was CVE-2026-21626 published?: CVE-2026-21626 was published on 2026-02-06 and last updated on 2026-06-17.

References

https://stackideas.com/easydiscuss

Affected products (1)

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

More vulnerabilities in Stackideas Easydiscuss

CVE-2026-21625 — High (CVSS 8.8): User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by…
CVE-2023-51810 — High (CVSS 7.5): SQL injection vulnerability in StackIdeas EasyDiscuss v.5.0.5 and fixed in v.5.0.10 allows a remote attacker to obtain…
CVE-2026-21624 — Medium (CVSS 5.4): Lack of input filterung leads to a persistent XSS vulnerability in the user avatar text handling of the Easy Discuss…
CVE-2026-21623 — Medium (CVSS 5.4): Lack of input filterung leads to a persistent XSS vulnerability in the forum post handling of the Easy Discuss…
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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