CVE-2025-62710 json
Sakai kernel-impl: predictable PRNG used to generate server‑side encryption key in EncryptionUtilityServiceImpl
published 2025-10-22 12 mo ago modified 2026-10-08 32 d ago also EUVD-2025-35623 , GHSA-gr7h-xw4f-wh86
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
Sakai is a Collaboration and Learning Environment. Prior to versions 23.5 and 25.0, EncryptionUtilityServiceImpl initialized an AES256TextEncryptor password (serverSecretKey) using RandomStringUtils with the default java.util.Random. java.util.Random is a non‑cryptographic PRNG and can be predicted from limited state/seed information (e.g., start time window), substantially reducing the effective search space of the generated key. An attacker who can obtain ciphertexts (e.g., exported or at‑rest strings protected by this service) and approximate the PRNG seed can feasibly reconstruct the serverSecretKey and decrypt affected data. SAK-49866 is patched in Sakai 23.5, 25.0, and trunk.
Patch / fix
- org.sakaiproject.kernel sakai-kernel-impl 23.5, 25.0
- sakailms sakai 23.5, 25.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 12 mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.sakaiproject.kernel:sakai-kernel-impl | <=23.3 |
no fix listed |
Affected products
- sakaiproject sakai
Classification
- Weakness
-
- CWE-337 Predictable Seed in Pseudo-Random Number Generator (PRNG)
References
-
github.com
/sakaiproject/sakai/commit/bde070104b1de01f4a6458dca6d9e0880a0e3c04
web, patch
-
github.com
/sakaiproject/sakai/security/advisories/GHSA-gr7h-xw4f-wh86
web, patch, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-62710
advisory
-
github.com
/sakaiproject/sakai
package
Sources
- CVE List CVE-2025-62710
- GitHub Advisory GHSA-gr7h-xw4f-wh86
- NVD CVE-2025-62710
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.