How severe is CVE-2023-31606?

CVE-2023-31606 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-31606 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-31606?

CVE-2023-31606 affects Promptworks Redcloth. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-31606?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-31606 published?

CVE-2023-31606 was published on 2023-06-06 and last updated on 2026-06-17.

CVE-2023-31606

CVE-2023-31606 is a high-severity vulnerability in Promptworks Redcloth with a CVSS 3.x base score of 7.5. 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-1333.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1333
Affected product: Promptworks Redcloth
Published: 2023-06-06
Last modified: 2026-06-17

Description

A Regular Expression Denial of Service (ReDoS) issue was discovered in the sanitize_html function of redcloth gem v4.0.0. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.

Frequently asked questions

What is CVE-2023-31606?: A Regular Expression Denial of Service (ReDoS) issue was discovered in the sanitize_html function of redcloth gem v4.0.0. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.
How severe is CVE-2023-31606?: CVE-2023-31606 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-31606 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-31606?: CVE-2023-31606 affects Promptworks Redcloth. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-31606?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-31606 published?: CVE-2023-31606 was published on 2023-06-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:promptworks:redcloth:*:*:*:*:*:ruby:*:*

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