How severe is CVE-2023-3247?

CVE-2023-3247 has a CVSS 3.x base score of 2.6, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-3247 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3247?

CVE-2023-3247 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-3247?

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

When was CVE-2023-3247 published?

CVE-2023-3247 was published on 2023-07-22 and last updated on 2026-06-17.

CVE-2023-3247

CVE-2023-3247 is a low-severity vulnerability in Php with a CVSS 3.x base score of 2.6. 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-330.

Key facts

Severity: Low (CVSS 3.x base score 2.6)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Php
Published: 2023-07-22
Last modified: 2026-06-17

Description

In PHP versions 8.0.* before 8.0.29, 8.1.* before 8.1.20, 8.2.* before 8.2.7 when using SOAP HTTP Digest Authentication, random value generator was not checked for failure, and was using narrower range of values than it should have. In case of random generator failure, it could lead to a disclosure of 31 bits of uninitialized memory from the client to the server, and it also made easier to a malicious server to guess the client's nonce.

Frequently asked questions

What is CVE-2023-3247?: In PHP versions 8.0.* before 8.0.29, 8.1.* before 8.1.20, 8.2.* before 8.2.7 when using SOAP HTTP Digest Authentication, random value generator was not checked for failure, and was using narrower range of values than it should have. In case of random generator failure, it could lead to a disclosure of 31 bits of uninitialized memory from the client to the server, and it also made easier to a malicious server to guess the client's nonce.
How severe is CVE-2023-3247?: CVE-2023-3247 has a CVSS 3.x base score of 2.6, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-3247 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3247?: CVE-2023-3247 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-3247?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-3247 published?: CVE-2023-3247 was published on 2023-07-22 and last updated on 2026-06-17.

References

https://github.com/php/php-src/security/advisories/GHSA-76gg-c692-v2mw

Affected products (1)

cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

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CVE-2025-64097 — Critical (CVSS 9.8): NervesHub is a web service that allows users to manage over-the-air (OTA) firmware updates of devices in the field. A…
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Browse all CWE-330 (Use of Insufficiently Random Values) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

221.12.37.6 (ipv4-addr)
51.81.85.130 (ipv4-addr)
122.3.106.113 (ipv4-addr)