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CVE-2023-27560

24
FAUCET Score

CVE-2023-27560 describes an infinite loop vulnerability in the Math/PrimeField.php component of phpseclib 3.x prior to version 3.0.19, affecting phpseclib products. This vulnerability carries a CVSS score of 7.5 (High), indicating a network-exploitable flaw with low attack complexity that can lead to high availability impact, specifically denial of service. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 3.0.19CPE matchmatch criteria
cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.81%
Probability of exploitation in next 30 days
EPSS Percentile
53.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0081 is in the 29th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: phpseclib/phpseclibFixed in: 3.0.19
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-hm7p-r324-hhf3high

phpseclib Infinite Loop vulnerability

Mar 3, 2023

References

github.com / phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
Patch
github.com / phpseclib/phpseclib/releases/tag/3.0.19
Release Notes