What is CVE-2021-22889?

CVE-2021-22889 is a medium-severity vulnerability in Revive-Adserver Revive Adserver, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-03-25.

How severe is CVE-2021-22889?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-22889 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Revive-Adserver Revive Adserver

CVE-2021-22889

Revive Adserver before v5.2.0 is vulnerable to a reflected XSS vulnerability in the `statsBreakdown` parameter of stats.php (and possibly other scripts) due to single quotes not being escaped. An attacker could trick a user with access to the user interface of a Revive Adserver instance into clicking on a specifically crafted URL and pressing a certain key combination to execute injected JavaScript code.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.363 (98.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Revive-adserver Revive_adserver
N/a Https://github.com/revive-adserver/revive-adserver — versions Fixed in v5.2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

support@hackerone.com (x_refsource_MISC, Vendor Advisory)
support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC)
support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-22889?: CVE-2021-22889 is a medium-severity vulnerability in Revive-Adserver Revive Adserver, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-03-25.
How severe is CVE-2021-22889?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-22889 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.