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CVE-2021-45887

32
FAUCET Score

CVE-2021-45887 is a critical path traversal vulnerability affecting PONTON X/P Messenger versions prior to 3.11.2. This flaw allows web application administrators to upload malicious ZIP files containing executable scripts, leading to remote code execution on the underlying server. With a CVSS score of 9.8 (Critical), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, resulting in complete compromise of confidentiality, integrity, and availability. While the vulnerability is severe, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.8.0CPE matchmatch criteria
cpe:2.3:a:ponton:x\/p_messenger:3.8.0:*:*:*:*:*:*:*
3.10.0CPE matchmatch criteria
cpe:2.3:a:ponton:x\/p_messenger:3.10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.25%
Probability of exploitation in next 30 days
EPSS Percentile
87.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0325 is in the 79th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ponton.de / products/xpmessenger
ProductVendor Advisory
syss.de / fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-077.txt
ExploitThird Party Advisory