High severity · published Sep 23, 2021
CVE-2021-22948
Vulnerability in the generation of session IDs in revive-adserver < 5.3.0, based on the cryptographically insecure uniqid() PHP function
7.1
CVSS
2.7%
EPSS
No
On KEV
Description
Vulnerability in the generation of session IDs in revive-adserver < 5.3.0, based on the cryptographically insecure uniqid() PHP function. Under some circumstances, an attacker could theoretically be able to brute force session IDs in order to take over a specific account.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
Revive Adserver · Revive-adserver
before 5.3.0; 5.3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22948
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22948
Exploit
https://hackerone.com/reports/1187820
Patch
https://www.revive-adserver.com/security/revive-sa-2021-005/
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