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CVE-2026-21626

CRITICALCVSS 9.2/10EPSS 0.37%

Last modified

CVE-2026-21626 is a critical-severity vulnerability rated 9.2/10 on the CVSS scale. 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. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1
7.5/10

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

CVSS 4.0
9.2/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.37%

28.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
StackideasEasydiscuss>= 1.0.0, <= 5.0.15

References

Timeline

Published
Last Modified
Status
Analyzed

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 score of 9.2/10 (CRITICAL severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.
How do I fix CVE-2026-21626?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-21626?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST