How severe is CVE-2026-31272?

CVE-2026-31272 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-31272 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31272?

CVE-2026-31272 affects Mrcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-31272?

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

Does CVE-2026-31272 have an EU (EUVD) identifier?

Yes. CVE-2026-31272 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19767.

When was CVE-2026-31272 published?

CVE-2026-31272 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-31272

CVE-2026-31272 is a critical-severity vulnerability in Mrcms with a CVSS 3.x base score of 9.8. 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-284.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19767
Weakness: CWE-284
Affected product: Mrcms
Published: 2026-04-07
Last modified: 2026-06-17

Description

MRCMS 3.1.2 contains an access control vulnerability. The save() method in src/main/java/org/marker/mushroom/controller/UserController.java lacks proper authorization validation, enabling direct addition of super administrator accounts without authentication.

Frequently asked questions

What is CVE-2026-31272?: MRCMS 3.1.2 contains an access control vulnerability. The save() method in src/main/java/org/marker/mushroom/controller/UserController.java lacks proper authorization validation, enabling direct addition of super administrator accounts without authentication.
How severe is CVE-2026-31272?: CVE-2026-31272 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-31272 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31272?: CVE-2026-31272 affects Mrcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-31272?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-31272 have an EU (EUVD) identifier?: Yes. CVE-2026-31272 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19767.
When was CVE-2026-31272 published?: CVE-2026-31272 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/clockw1se0v0/Vul/blob/main/MRCMS/Unauthorized.md

Affected products (1)

cpe:2.3:a:mrcms:mrcms:3.1.2:*:*:*:*:*:*:*

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