How severe is CVE-2021-28134?

CVE-2021-28134 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-2021-28134 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28134?

CVE-2021-28134 affects Clipper Project Clipper. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28134?

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-2021-28134 published?

CVE-2021-28134 was published on 2021-03-11 and last updated on 2026-06-17.

CVE-2021-28134

CVE-2021-28134 is a critical-severity vulnerability in Clipper Project Clipper 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Clipper Project Clipper
Published: 2021-03-11
Last modified: 2026-06-17

Description

Clipper before 1.0.5 allows remote command execution. A remote attacker may send a crafted IPC message to the exposed vulnerable ipcRenderer IPC interface, which invokes the dangerous openExternal API.

Frequently asked questions

What is CVE-2021-28134?: Clipper before 1.0.5 allows remote command execution. A remote attacker may send a crafted IPC message to the exposed vulnerable ipcRenderer IPC interface, which invokes the dangerous openExternal API.
How severe is CVE-2021-28134?: CVE-2021-28134 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-2021-28134 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28134?: CVE-2021-28134 affects Clipper Project Clipper. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28134?: 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-2021-28134 published?: CVE-2021-28134 was published on 2021-03-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:clipper_project:clipper:*:*:*:*:*:*:*:*