THREATPORT/VULNERABILITY/CVE-2021-22872
MEDIUM SEVERITY

CVE-2021-22872

Revive Adserver vulnerability

CVSS
6.1
EPSS
3.4%
EPSS pct
88th
Exploited
No known
Revive Adserver before 5.1.0 is vulnerable to a reflected cross-site scripting (XSS) vulnerability via the publicly accessible afr.php delivery script. While this issue was previously addressed in modern browsers as CVE-2020-8115, some older browsers (e.g., IE10) that do not automatically URL encode parameters were still vulnerable.
Affected vendor
Revive Adserver
Affected product
Revive Adserver
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness type (CWE)
  • CWE-79 — Cross-Site Scripting (XSS)
Published
2021-01-26

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity.

Its EPSS score of 3.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2021-22872

  • Confirm whether Revive Adserver Revive Adserver is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-22872.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-22872

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-22872 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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Are you exposed to CVE-2021-22872?

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