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CVE-2022-21649

16
FAUCET Score

CVE-2022-21649 is a stored cross-site scripting (XSS) vulnerability affecting Convos, an open-source multi-user web chat application. The flaw allows an attacker to inject malicious scripts by exploiting improper escaping of double quotes within "https://" links, specifically through onfocus and autofocus attributes. This medium-severity vulnerability (CVSS 5.4) requires user interaction and authenticated access, potentially leading to limited impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.52CPE matchmatch criteria
cpe:2.3:a:convos:convos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.93%
Probability of exploitation in next 30 days
EPSS Percentile
57.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0093 is in the 91st percentile among its peer group of 15,224 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

blog.pocas.kr / 2021/12/30/2021-12-30-s-xss-convos-chat
Broken LinkThird Party Advisory
github.com / convos-chat/convos/commit/86b2193de375005ba71d9dd53843562c6ac1847c
PatchThird Party Advisory
github.com / convos-chat/convos/security/advisories/GHSA-xmpj-xwm3-vww7
PatchThird Party Advisory
huntr.dev / bounties/4532a0ac-4e7c-4fcf-9fe3-630e132325c0
ExploitPatchThird Party Advisory