CVE-2021-22948

7.1 highEPSS 2.7%

High (7.1) in revive-adserver revive adserver. EPSS 2.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.1 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

EPSS: 2.7% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-10-31)
CWEs: CWE-338, CWE-79
Published: 2021-09-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

revive-adserver:revive_adserver

References

https://hackerone.com/reports/1187820
https://www.revive-adserver.com/security/revive-sa-2021-005/
https://hackerone.com/reports/1187820
https://www.revive-adserver.com/security/revive-sa-2021-005/

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