Is CVE-2021-22948 in the CISA KEV catalog?

No. CVE-2021-22948 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-22948?

CVE-2021-22948 has a CVSS v3 base score of 7.1 (HIGH).

What is the EPSS score for CVE-2021-22948?

CVE-2021-22948 has an EPSS score of 2.63% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-22948?

Upgrade revive adserver to 5.3.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-22948

HIGHEPSS 84th pctl

7.1

CVSS v3

NVD

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.

CWE-79Cross-Site Scripting (XSS)CWE-338

How to fix

Remediation Available

revive adserverNVD

Affected:< 5.3.0Fixed in:5.3.0CVE-2021-22948derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

2.63%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Patch1

revive-adserver.com

Exploit1

hackerone.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.