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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.305 (98.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.363 · newest: 0.305 · change: -0.058
Affected products
- Revive-Adserver Revive Adserver
- Https://github.com/revive-Adserver/revive-Adserver — versions Fixed in v5.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.revive-adserver.com/security/revive-sa-2021-003/ (Vendor Advisory)
- hackerone.com/reports/1097217 (Exploit, Third Party Advisory)
- github.com/revive-adserver/revive-adserver/commit/2f868414 (Patch, Third Party Advisory)
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.