CVE-2023-27560

Name: CVE-2023-27560
Creator: NVD / NIST
Published: 2023-03-03T06:15:08.653+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2023-27560 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Math/PrimeField.php in phpseclib 3.x before 3.0.19 has an infinite loop with composite primefields.. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

Description

Math/PrimeField.php in phpseclib 3.x before 3.0.19 has an infinite loop with composite primefields.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.81%

52.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Phpseclib	Phpseclib	>= 3.0.0, < 3.0.19

References

Timeline

Published: Mar 3, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-27560?

Math/PrimeField.php in phpseclib 3.x before 3.0.19 has an infinite loop with composite primefields.

How severe is CVE-2023-27560?

CVE-2023-27560 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2023-27560?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-27560?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST