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Fencer Vulns
high 7.5

CVE-2021-33589 json

Ribose RNP before 0.15.1 does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than on the tin of…

published 2023-04-21 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-20274

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

Ribose RNP before 0.15.1 does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than on the tin of the algorithm.

Patch / fix

  • ribose rnp 0.15.1
  • rnp Debian 14, Debian 13, Debian 12 0.15.1-1

debian advisories DEBIAN-CVE-2021-33589

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • open.ribose.com https://open.ribose.com/advisories/ra-2021-05-30/#CVE-2021-33589 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Classification

Weakness
  • CWE-522 Insufficiently Protected Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.