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CVE-2023-22487

18
FAUCET Score

CVE-2023-22487 is a data leakage vulnerability affecting Flarum forum software versions prior to 1.6.3, specifically within the flarum/mentions extension. An authenticated attacker with post creation privileges can exploit this flaw to leak the full JSON:API payload of any mentioned post, including content, date, and attributes, even if they lack direct access to that post. This medium-severity vulnerability (CVSS 4.3) allows for unauthorized disclosure of sensitive forum data, including posts awaiting approval or those in restricted tags. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.6.3CPE matchmatch criteria
cpe:2.3:a:flarum:flarum:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.7HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.66%
Probability of exploitation in next 30 days
EPSS Percentile
48.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0066 is in the 58th percentile among its peer group of 21,958 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 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: flarum/mentionsFixed in: 1.6.3
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-22m9-m3ww-53h3high

Flarum post mentions can be used to read any post on the forum without access control

Jan 10, 2023

References

github.com / flarum/framework/commit/ab1c868b978e8b0d09a5d682c54665dae17d0985
PatchThird Party Advisory
github.com / flarum/framework/security/advisories/GHSA-22m9-m3ww-53h3
ExploitMitigationThird Party Advisory