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CVE-2021-30130phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.
- 7.5HighCVSS base score
- 1.1%Exploitation in 30 daysEPSS · top 35% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.
Timeline
ID reserved
By mitre
- 1 day later
· 1 day later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 1.1% · top 35% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistphpseclib/phpseclibGHSA-vf4w-fg7r-5v94 (opens in a new tab)
References
References5
- https://github.com/phpseclib/phpseclib/pull/1635 (opens in a new tab)x_transferred
- https://github.com/phpseclib/phpseclib/releases/tag/3.0.7 (opens in a new tab)x_transferred
- https://github.com/phpseclib/phpseclib/releases/tag/2.0.31 (opens in a new tab)x_transferred
- [debian-lts-announce] 20221117 [SECURITY] [DLA 3197-1] phpseclib security update (opens in a new tab)mailing-listx_transferred
- [debian-lts-announce] 20221117 [SECURITY] [DLA 3198-1] php-phpseclib security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-0879 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-vf4w-fg7r-5v94 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-30130)Record last updated .