VDB-168740 · CVE-2021-22872 · GCVE-0-2021-22872

Revive Adserver up to 5.0.x afr.php cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.6	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in Revive Adserver up to 5.0.x. Affected by this vulnerability is an unknown functionality of the file afr.php. Such manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2021-22872. It is possible to launch the attack remotely. Furthermore, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Revive Adserver up to 5.0.x (Advertising Software). It has been rated as problematic. Affected by this issue is an unknown code block of the file afr.php. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity.

The weakness was published 01/27/2021. The advisory is shared for download at hackerone.com. This vulnerability is handled as CVE-2021-22872. Successful exploitation requires user interaction by the victim. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.007.

The exploit is available at packetstormsecurity.com. It is declared as proof-of-concept. By approaching the search of inurl:afr.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 5.1.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Advertising Software

Vendor

Revive

Name

Adserver

Version

License

free

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 3.5
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Adserver 5.1.0
Patch: github.com

Timelineinfo

01/06/2021 🔍
01/27/2021 +21 days 🔍
01/27/2021 +0 days 🔍
05/04/2025 +1558 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-22872 (🔍)
GCVE (CVE): GCVE-0-2021-22872
GCVE (VulDB): GCVE-100-168740
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/27/2021 10:53
Updated: 05/04/2025 07:11
Changes: 01/27/2021 10:53 (41), 02/20/2021 10:55 (5), 02/20/2021 10:59 (18), 06/23/2024 16:36 (22), 05/04/2025 07:11 (3)
Complete: 🔍
Cache ID: 216::103