How severe is CVE-2021-40651?

CVE-2021-40651 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-40651 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40651?

CVE-2021-40651 affects Os4ed Opensis. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40651?

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

When was CVE-2021-40651 published?

CVE-2021-40651 was published on 2021-09-29 and last updated on 2026-06-17.

CVE-2021-40651

CVE-2021-40651 is a medium-severity vulnerability in Os4ed Opensis with a CVSS 3.x base score of 6.5. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Os4ed Opensis
Published: 2021-09-29
Last modified: 2026-06-17

Description

OS4Ed OpenSIS Community 8.0 is vulnerable to a local file inclusion vulnerability in Modules.php (modname parameter), which can disclose arbitrary file from the server's filesystem as long as the application has access to the file.

Frequently asked questions

What is CVE-2021-40651?: OS4Ed OpenSIS Community 8.0 is vulnerable to a local file inclusion vulnerability in Modules.php (modname parameter), which can disclose arbitrary file from the server's filesystem as long as the application has access to the file.
How severe is CVE-2021-40651?: CVE-2021-40651 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-40651 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40651?: CVE-2021-40651 affects Os4ed Opensis. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40651?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40651 published?: CVE-2021-40651 was published on 2021-09-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:os4ed:opensis:8.0:*:*:*:community:*:*:*

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