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CVE-2021-22948

HIGH
7.1
CVSS Score
Published: September 23, 2021 at 12:44 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorRevive Adserver

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Severity
HIGH7.1
Exploit prediction
EPSS 3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Revive Adserver· Revive Adserver
95%
v < 5.3.05.3.0 rc1Fixed version v5.3.0
Affected range stops below 5.3.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1187820
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://www.revive-adserver.com/security/revive-sa-2021-005/

CVSS

7.1HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79CWE-338

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