How severe is CVE-2023-30521?

CVE-2023-30521 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2023-30521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-30521?

CVE-2023-30521 affects Jenkins Assembla Merge Request Builder. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-30521?

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

When was CVE-2023-30521 published?

CVE-2023-30521 was published on 2023-04-12 and last updated on 2026-06-17.

CVE-2023-30521

CVE-2023-30521 is a medium-severity vulnerability in Jenkins Assembla Merge Request Builder with a CVSS 3.x base score of 5.3. 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Jenkins Assembla Merge Request Builder
Published: 2023-04-12
Last modified: 2026-06-17

Description

A missing permission check in Jenkins Assembla merge request builder Plugin 1.1.13 and earlier allows unauthenticated attackers to trigger builds of jobs corresponding to the attacker-specified repository.

Frequently asked questions

What is CVE-2023-30521?: A missing permission check in Jenkins Assembla merge request builder Plugin 1.1.13 and earlier allows unauthenticated attackers to trigger builds of jobs corresponding to the attacker-specified repository.
How severe is CVE-2023-30521?: CVE-2023-30521 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2023-30521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-30521?: CVE-2023-30521 affects Jenkins Assembla Merge Request Builder. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-30521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-30521 published?: CVE-2023-30521 was published on 2023-04-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:assembla_merge_request_builder:*:*:*:*:*:jenkins:*:*

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