How severe is CVE-2023-46404?

CVE-2023-46404 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-46404 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-46404?

CVE-2023-46404 affects Utoronto Pcrs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-46404?

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-2023-46404 published?

CVE-2023-46404 was published on 2023-11-03 and last updated on 2026-06-17.

CVE-2023-46404

Q: What is CVE-2023-46404?

PCRS <= 3.11 (d0de1e) “Questions” page and “Code editor” page are vulnerable to remote code execution (RCE) by escaping Python sandboxing.

CVE-2023-46404 is a critical-severity vulnerability in Utoronto Pcrs with a CVSS 3.x base score of 9.9. 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Utoronto Pcrs
Published: 2023-11-03
Last modified: 2026-06-17

Description

PCRS <= 3.11 (d0de1e) “Questions” page and “Code editor” page are vulnerable to remote code execution (RCE) by escaping Python sandboxing.

Frequently asked questions

What is CVE-2023-46404?: PCRS <= 3.11 (d0de1e) “Questions” page and “Code editor” page are vulnerable to remote code execution (RCE) by escaping Python sandboxing.
How severe is CVE-2023-46404?: CVE-2023-46404 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-46404 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-46404?: CVE-2023-46404 affects Utoronto Pcrs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-46404?: 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-2023-46404 published?: CVE-2023-46404 was published on 2023-11-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:utoronto:pcrs:*:*:*:*:*:*:*:*

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