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CVE-2021-24867

Backdoored Plugins & Themes from AccessPress Themes

Exploitation likely. EPSS gives it a 18% chance of exploitation in the next 30 days. Fixed versions are out.

CVSS 3.19.8CriticalEPSS percentile97th18% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products10 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • AccessPress Themes Frontend Post WordPress Plugin – AccessPress Anonymous PostAffected: ≥ 2.8.0, < 2.8.0*Upgrade to: 2.8.0*Affected: ≥ 2.8.1, < 2.8.1Upgrade to: 2.8.1Stated by: CVE record
  • AccessPress Themes AccessPress Custom CSSAffected: ≥ 2.0.1, < 2.0.1*Upgrade to: 2.0.1*Affected: ≥ 2.0.2, < 2.0.2Upgrade to: 2.0.2Stated by: CVE record
  • AccessPress Themes AccessPress Custom Post TypeAffected: ≥ 1.0.8, < 1.0.8*Upgrade to: 1.0.8*Affected: ≥ 1.0.9, < 1.0.9Upgrade to: 1.0.9Stated by: CVE record
  • AccessPress Themes Social Auto PosterAffected: ≥ 2.1.3, < 2.1.3*Upgrade to: 2.1.3*Affected: ≥ 2.1.4, < 2.1.4Upgrade to: 2.1.4Stated by: CVE record
  • AccessPress Themes AccessPress iFeedsAffected: ≥ 4.0.3, < 4.0.3*Upgrade to: 4.0.3*Affected: ≥ 4.0.4, < 4.0.4Upgrade to: 4.0.4Stated by: CVE record

Versions as the sources state them. 92 more products have version data. Full version matrix after sign-in

Check it yourselfA free Nuclei check exists for this CVE. Run it against your hosts.Is your organisation exposed?Discuss checks for your systems with a specialist. Scope is agreed before testing.

What it is

From the CVE record

Numerous Plugins and Themes from the AccessPress Themes (aka Access Keys) vendor are backdoored due to their website being compromised. Only plugins and themes downloaded via the vendor website are affected, and those hosted on wordpress.org are not. However, all of them were updated or removed to avoid any confusion

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS97th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

18% chance of exploitation activity in the next 30 days, which ranks it in the 97th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 1582 days, from the signal feeds we watch.

  1. EPSS band changelow → moderate
  2. Nuclei check added
  3. Record updated
  4. Publishedweakness classified

Affected products

And 170 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 9.8 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

Watch the software you run.

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We'll flag the next CVE, public exploit or patch for AccessPress Themes, not every advisory.