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CVE-2019-1000021

24
FAUCET Score

CVE-2019-1000021 describes an incorrect access control vulnerability in slixmpp versions prior to 1.4.2, specifically within the XEP-0223 plugin's options profile. This flaw allows private data published to a PEP node to be exposed to all of a victim's contacts if the node is not explicitly configured as private. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, potentially leading to significant information disclosure. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.2CPE matchmatch criteria
cpe:2.3:a:slixmpp_project:slixmpp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.32%
Probability of exploitation in next 30 days
EPSS Percentile
81.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0232 is in the 67th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: slixmppFixed in: 1.4.2

Vendor Advisories (1)

pipGHSA-4g62-mfwx-4q48high

slixmpp Incorrect Access Control

May 13, 2022

References

lab.louiz.org / poezio/slixmpp/commit/7cd73b594e8122dddf847953fcfc85ab4d316416
PatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/GKBXN7EAAR7ENEZUBKV6C6MP6QBXYTWT
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WIBP4LD2V4TBJSLZXDUAGQMD6CUI2TZR
xmpp.org / extensions/xep-0223.html
ExploitThird Party Advisory