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Vulnerability details: VCID-mdpv-8kp1-47eb
Vulnerability ID VCID-mdpv-8kp1-47eb
Aliases CVE-2023-27560
GHSA-hm7p-r324-hhf3
Summary phpseclib Infinite Loop vulnerability Math/PrimeField.php in phpseclib has an infinite loop with composite primefields. This vulnerability was introduced in version 3.0.0, and has been patched in 3.0.19. The CVE for this issue originally identified the the vulnerable version as 2.x, however, the vulnerable functionality was not introduced until version 3.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00147 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00151 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00151 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
epss 0.00171 https://api.first.org/data/v1/epss?cve=CVE-2023-27560
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-hm7p-r324-hhf3
cvssv3.1 7.5 https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2023-27560.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2023-27560.yaml
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib
generic_textual HIGH https://github.com/phpseclib/phpseclib
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
generic_textual HIGH https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
ssvc Track https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440#commitcomment-103226722
generic_textual HIGH https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440#commitcomment-103226722
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib/releases/tag/3.0.19
generic_textual HIGH https://github.com/phpseclib/phpseclib/releases/tag/3.0.19
ssvc Track https://github.com/phpseclib/phpseclib/releases/tag/3.0.19
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2023-27560
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2023-27560
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2023-27560
https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2023-27560.yaml
https://github.com/phpseclib/phpseclib
https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440#commitcomment-103226722
https://github.com/phpseclib/phpseclib/releases/tag/3.0.19
https://nvd.nist.gov/vuln/detail/CVE-2023-27560
1032371 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1032371
cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
GHSA-hm7p-r324-hhf3 https://github.com/advisories/GHSA-hm7p-r324-hhf3
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2023-27560.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-03-06T20:16:55Z/ Found at https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib/commit/6298d1cd55c3ffa44533bd41906caec246b60440#commitcomment-103226722
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib/releases/tag/3.0.19
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-03-06T20:16:55Z/ Found at https://github.com/phpseclib/phpseclib/releases/tag/3.0.19
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2023-27560
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.35934
EPSS Score 0.00147
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:43:41.098370+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/03/GHSA-hm7p-r324-hhf3/GHSA-hm7p-r324-hhf3.json 37.0.0