CVE-2021-30134

MEDIUMNVD 6.16.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 1.3% (69th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this weekElevated
6.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 1.3%CVSS: 6.1Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

php-mod/curl (a wrapper of the PHP cURL extension) before 2.3.2 allows XSS via the post_file_path_upload.php key parameter and the POST data to post_multidimensional.php.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
43
EG Risk 43/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity61% × 45%
The EG Score, 6.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.3%
EPSS %ILE
69th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

December 26, 2022

Last Modified

April 14, 2025

References (1)

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
php-mod/curl1.0 ... v1.1.0 (27 versions)
  • every version up to 2.3.2: fixed in 2.3.2
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 33× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 90 of 185 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 10 repeat rows among the latest 100 are merged into the row they repeat. The 95 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:28 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  2. 2026-10-15 05:24 UTCOSV refresh
  3. 2026-10-14 16:28 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  4. 2026-10-13 16:28 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  5. 2026-10-12 19:18 UTCEG score recompute
  6. 2026-10-12 16:29 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  7. 2026-10-11 23:44 UTCEG score recompute
  8. 2026-10-11 13:43 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  9. 2026-10-10 19:56 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  10. 2026-10-09 20:04 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  11. 2026-10-08 16:39 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  12. 2026-10-07 23:44 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  13. 2026-10-06 15:14 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  14. 2026-10-05 17:40 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  15. 2026-10-04 23:19 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  16. 2026-10-03 14:22 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  17. 2026-10-02 16:22 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  18. 2026-10-01 19:46 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  19. 2026-09-30 15:34 UTCEG score recompute
  20. 2026-09-30 15:00 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  21. 2026-09-29 15:15 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  22. 2026-09-28 13:47 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  23. 2026-09-27 13:41 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  24. 2026-09-26 15:54 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  25. 2026-09-26 00:21 UTCEPSS rescoreEPSS 1.3% · 68th percentile
Show 65 more
  1. 2026-09-24 14:00 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  2. 2026-09-24 02:06 UTCOSV refresh
  3. 2026-09-23 13:44 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  4. 2026-09-21 20:28 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  5. 2026-09-19 15:37 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  6. 2026-09-18 19:23 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  7. 2026-09-17 19:23 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  8. 2026-09-16 14:05 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  9. 2026-09-15 03:06 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  10. 2026-09-13 16:43 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  11. 2026-09-12 14:57 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  12. 2026-09-11 14:49 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  13. 2026-09-11 09:33 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  14. 2026-09-08 21:56 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  15. 2026-09-07 15:58 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  16. 2026-09-06 13:44 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  17. 2026-09-05 15:25 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  18. 2026-09-04 19:54 UTCOSV refresh
  19. 2026-09-04 13:57 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  20. 2026-09-04 05:03 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  21. 2026-09-02 14:08 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  22. 2026-09-01 13:50 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  23. 2026-09-01 03:32 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  24. 2026-08-30 19:14 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  25. 2026-08-30 01:19 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  26. 2026-08-28 21:37 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  27. 2026-08-27 14:22 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  28. 2026-08-26 14:42 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  29. 2026-08-25 13:45 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  30. 2026-08-24 14:12 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  31. 2026-08-23 00:16 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  32. 2026-08-21 23:46 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  33. 2026-08-20 22:52 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  34. 2026-08-19 17:01 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  35. 2026-08-18 13:45 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  36. 2026-08-18 07:04 UTCOSV refresh
  37. 2026-08-17 13:44 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  38. 2026-08-16 14:53 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  39. 2026-08-16 02:11 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  40. 2026-08-15 01:27 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  41. 2026-08-13 21:57 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  42. 2026-08-12 13:47 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  43. 2026-08-11 13:38 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  44. 2026-08-09 13:43 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  45. 2026-08-08 16:33 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  46. 2026-08-07 16:23 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  47. 2026-08-06 13:43 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  48. 2026-08-05 19:14 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  49. 2026-08-04 15:06 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  50. 2026-08-04 10:34 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  51. 2026-08-03 10:33 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  52. 2026-08-03 01:57 UTCOSV refresh
  53. 2026-08-02 02:24 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  54. 2026-08-01 04:13 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  55. 2026-07-30 16:25 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  56. 2026-07-30 01:27 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  57. 2026-07-28 15:33 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  58. 2026-07-26 14:52 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  59. 2026-07-25 14:15 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  60. 2026-07-24 14:15 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  61. 2026-07-23 14:16 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  62. 2026-07-23 02:00 UTCEG score recompute
  63. 2026-07-22 22:47 UTCEG score recompute
  64. 2026-07-22 14:06 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  65. 2026-07-21 15:22 UTCEPSS rescoreEPSS 1.3% · 66th percentile

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2021/CVE-2021-30134.yaml
    Published Feb 16, 2023

    Php-mod/curl Library <2.3.2 - Cross-Site Scripting

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-30134?
CVE-2021-30134 is a medium-severity vulnerability; its CVE record was published on December 26, 2022. php-mod/curl (a wrapper of the PHP cURL extension) before 2.3.2 allows XSS via the postfilepathupload.php key parameter and the POST data to postmultidimensional.php.
When was the CVE record for CVE-2021-30134 published?
The CVE record for CVE-2021-30134 was published on December 26, 2022. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of April 14, 2025; the record at its source may have been updated since.
Is CVE-2021-30134 actively exploited?
CVE-2021-30134 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.3% probability of exploitation in the next 30 days (69th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-30134?
CVE-2021-30134 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2021-30134?
A fix for CVE-2021-30134 is available: update to the fixed version the vendor names in its advisory.

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