6.4

CVE-2023-5057: automattic activitypub Cross-site Scripting

CVSS: 6.4v3.1MediumModified
Published 16-10-2023Last modified 02-08-2024
Open JSON

Vulnerability summary

CVE-2023-5057 is a medium (CVSS 6.4) Cross-site Scripting vulnerability in automattic activitypub. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 40.8% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 1.0.0.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.4/10
010
Medium · v3.1 (wordfence)
EPSS score
0.49%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 16-10-2023
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

+0.07 pp

From 0.42% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.49%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Automattic1 product
Unknown1 product
Wordpress1 product
  • activitypub≤ 0.17.0 (fixed in 1.0.0)

3 vendors · 3 products

References

2 links