What’s Vulnerable › Vulnerabilities

CVE-2023-27560

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-03 · updated 2026-06-17
• Weakness: CWE-835

Description

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

Affected products

• phpseclib: from 3.0.0 before 3.0.19 — fixed in 3.0.19

How to fix

Upgrade to a fixed version: phpseclib 3.0.19. Check the vendor advisory for mitigations.

References

• https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
• https://github.com/phpseclib/phpseclib/releases/tag/3.0.19
• https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
• https://github.com/phpseclib/phpseclib/releases/tag/3.0.19

Get alerted when CVE-2023-27560 or the next vulnerability affects your stack