Vulnerability Assessment
| Impact | CVSS score of 5.4 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, user interaction required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
The ActivityPub WordPress plugin before 1.0.0 does not escape user metadata before outputting them in mentions, which could allow users with a role of Contributor and above to perform Stored XSS. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The ActivityPub WordPress plugin before 1.0.0 does not escape user metadata before outputting them in mentions, which could allow users with a role of Contributor and above to perform Stored XSS attacks Affected products include: Automattic Activitypub. Version information: before 1.0.0.
Know when Activitypub gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
The ActivityPub WordPress plugin before 1.0.0 does not escape user metadata before outputting them in mentions, which could allow users with a role of Contributor and above to perform Stored XSS attacks
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)NVD
More in Activitypub
View allHeap-based buffer overflow in snac2 before 2.93 enables unauthenticated remote attackers to crash the ActivityPub server
Improper access control in the ActivityPub WordPress plugin before 8.0.2 exposes draft, scheduled, and pending posts to
The ActivityPub WordPress plugin before 1.0.0 does not sanitize and escape some data from post content, which could allo
Missing actor-identity and object-ownership checks in the Discourse ActivityPub plugin allow remote attackers to edit, d
Replay of previously signed ActivityPub requests against YesWiki's public /api/forms/{formId}/actor/inbox endpoint lets
The ActivityPub WordPress plugin before 1.0.0 does not ensure that post contents to be displayed are public and belong t
The ActivityPub WordPress plugin before 1.0.0 does not ensure that post titles to be displayed are public and belong to
Ghost's ActivityPub service (self-hosted activitypub image, v1.0.0 through v1.2.5) fails to verify that an incoming Undo
GitHub PoC
Exploit-DB