BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
BuddyPress 14.4.0 contains a regular expression injection vulnerability in the activity mention resolver that, when username compatibility mode is enabled, allows attackers to manipulate a REGEXP database clause by crafting mention names containing regex metacharacters. Attackers can submit @mentions whose metacharacters pass through esc_sql unescaped and are inserted into an unprepared REGEXP query against the users table, enabling boolean-based inference of usernames and denial of service through catastrophic backtracking.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| buddypress | BuddyPress | up to 14.4.0 | — | No fix listed | CNA |
- BuddyPress Vendorbuddypress Affected up to 14.4.0 Fixed in — No fix listed CNA
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:buddypress:buddypress:*:*:*:*:*:*:*:* | — | — | buddypress |
- cpe:2.3:a:buddypress:buddypress:*:*:*:*:*:*:*:* Versions — — ·buddypress
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-53674
- 2026-10-03 Alias added: GHSA-8q4w-j47q-pg4x
- 2026-10-08 EPSS moved to the 50th–90th percentile
- 2026-10-25 EPSS moved to the below the 50th percentile
References
More buddypress vulnerabilities
- TI-2021-04488 BuddyPress privilege escalation via REST API CVSS 3.1HIGH 8.8
- TI-2014-01473 The Group creation process in the Buddypress plugin before 1.9.2 for WordPress allows… CVSS 3.0MEDIUM 6.5
- TI-2024-09291 BuddyPress <= 14.1.0 - Authenticated (Subscriber+) Directory Traversal CVSS 3.1HIGH 8.1
- TI-2020-04300 Private data exposure via REST API in BuddyPress CVSS 3.1HIGH 8.0
- TI-2026-38711 BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter CVSS 4.0HIGH 8.6
- TI-2025-38345 WordPress BuddyPress plugin <= 14.3.4 - Broken Access Control vulnerability CVSS 3.1HIGH 7.5
Sources
- CVE-2026-53674 · CVE Program
- CVE-2026-53674 · NVD
- FIRST EPSS
- GHSA-8q4w-j47q-pg4x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences