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CVE-2020-23957

20
FAUCET Score

CVE-2020-23957 describes a Cross-Site Scripting (XSS) vulnerability in Pega Platform versions up to 8.4.x, specifically exploitable via the ConnectionID parameter in a pyActivity=Data-TRACERSettings.pzStartTracerSession request to a PRAuth URI. This medium-severity vulnerability (CVSS 6.1) has a network attack vector and low attack complexity, requiring user interaction (UI:R) to achieve partial impact on confidentiality and integrity (C:L, I:L). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, indicating a low current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.4, <= 8.4.2CPE matchmatch criteria
cpe:2.3:a:pega:pega_platform:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.68%
Probability of exploitation in next 30 days
EPSS Percentile
48.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0068 is in the 53rd percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jayaramyalla.medium.com / cross-site-scripting-in-pega-cve-2020-23957-16d1c417da5f
ExploitThird Party Advisory