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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 30.5%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 30.54% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- revive-adserver/revive adserver
- Source
- support@hackerone.com
EPSS moved from 30.5% on 22 September 2026 to 30.5% on 3 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://github.com/revive-adserver/revive-adserver/commit/2f868414Patch, Third Party Advisory
- https://hackerone.com/reports/1097217Exploit, Third Party Advisory
- https://www.revive-adserver.com/security/revive-sa-2021-003/Vendor Advisory
- https://github.com/revive-adserver/revive-adserver/commit/2f868414Patch, Third Party Advisory
- https://hackerone.com/reports/1097217Exploit, Third Party Advisory
- https://www.revive-adserver.com/security/revive-sa-2021-003/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.