How severe is CVE-2021-30149?

CVE-2021-30149 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-2021-30149 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30149?

CVE-2021-30149 affects Ocproducts Composr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-30149?

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.

When was CVE-2021-30149 published?

CVE-2021-30149 was published on 2021-04-06 and last updated on 2026-06-17.

CVE-2021-30149

CVE-2021-30149 is a critical-severity vulnerability in Ocproducts Composr with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Ocproducts Composr
Published: 2021-04-06
Last modified: 2026-06-17

Description

Composr 10.0.36 allows upload and execution of PHP files.

Frequently asked questions

What is CVE-2021-30149?: Composr 10.0.36 allows upload and execution of PHP files.
How severe is CVE-2021-30149?: CVE-2021-30149 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-2021-30149 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30149?: CVE-2021-30149 affects Ocproducts Composr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-30149?: 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.
When was CVE-2021-30149 published?: CVE-2021-30149 was published on 2021-04-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ocproducts:composr:10.0.36:*:*:*:*:*:*:*

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