CVE-2021-30130

mediumpriority · track · 30EPSS 0.011 · 64 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.05% (64th) EPSS

CVSS 5 · medium

Is it mine?

10 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-347USprimaryCWE-295USCWE-347USCWE-347US

affected products (10)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Andreas Fischer phpseclib≤ 3.0.7fstec_bduRU
Andreas Fischer phpseclib≤ 2.0.31fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
debian debian linux= 10.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
phpseclib phpseclib< 2.0.31nvdUScpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
phpseclib phpseclib3.0 → 3.0.7nvdUScpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
Packagist phpseclib/phpseclib< 2.0.31osvUSpkg:composer/phpseclib/phpseclib
Packagist phpseclib/phpseclib3.0.0 → 3.0.7osvUSpkg:composer/phpseclib/phpseclib

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-vf4w-fg7r-5v94Improper Certificate Validation in phpseclib2021-04-07ghsa · osvUS
phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2021-04-06modified 2026-06-17

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references (18)

External citations — patches, advisories, analysis.

scry

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